[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"grammar-exercise-01a01413-a078-72a5-81b1-693aaf2c23f5":3,"grammar-exercise-lesson-019b9875-a5b8-753a-8892-02d60cf124f3":291},["Reactive",4],{"id":5,"grammarPage":6,"title":7,"instructions":8,"displayOrder":9,"type":10,"questions":11,"ogImageUrl":290},"01a01413-a078-72a5-81b1-693aaf2c23f5","\u002Fapi\u002Fgrammar_pages\u002F019b9875-a5b8-753a-8892-02d60cf124f3","Past Perfect Continuous - Find and Fix","One word in each sentence is wrong. Tap it, then choose the correction.",4,"find_and_fix",[12,42,63,87,112,132,155,178,199,225,248,270],{"id":13,"sentenceTemplate":14,"displayOrder":15,"explanation":16,"exampleSentence":17,"blanks":18,"payload":19},"01a01413-a078-73e9-81b1-693aaf9ccb59","When the doors opened, the security team had been went from entrance to entrance for two hours.",0,"Use “had been + -ing” for the ongoing earlier activity: the team had been going from entrance to entrance.","When the doors opened, the security team had been going from entrance to entrance for two hours.",[],{"hint":20,"words":21,"correct":37,"wrongIndex":38,"corrections":39},"The activity continued until the doors opened.",[22,23,24,25,23,26,27,28,29,30,31,32,33,32,34,35,36],"When","the","doors","opened,","security","team","had","been","went","from","entrance","to","for","two","hours.","going",9,[37,40,41],"goes","go",{"id":43,"sentenceTemplate":44,"displayOrder":45,"explanation":46,"exampleSentence":47,"blanks":48,"payload":49},"01a01413-a078-7449-81b1-693aafa37d68","Before the doctor called her, Nina had been waiting since three hours.",1,"Use “for” with a duration: Nina had been waiting for three hours before the call.","Before the doctor called her, Nina had been waiting for three hours.",[],{"hint":50,"words":51,"correct":34,"wrongIndex":38,"corrections":60},"“Three hours” is a duration.",[52,23,53,54,55,56,28,29,57,58,59,36],"Before","doctor","called","her,","Nina","waiting","since","three",[34,61,62,31],"at","by",{"id":64,"sentenceTemplate":65,"displayOrder":66,"explanation":67,"exampleSentence":68,"blanks":69,"payload":70},"01a01413-a078-7489-81b1-693aafe1f573","Yesterday, by the time the manager arrived at noon, the designers have been arguing since nine.",2,"Use past perfect continuous before a past reference point: “had been arguing”, not present perfect continuous.","Yesterday, by the time the manager arrived at noon, the designers had been arguing since nine.",[],{"hint":71,"words":72,"correct":28,"wrongIndex":82,"corrections":83},"The reference point is the manager’s arrival yesterday.",[73,62,23,74,23,75,76,61,77,23,78,79,29,80,58,81],"Yesterday,","time","manager","arrived","noon,","designers","have","arguing","nine.",11,[28,84,85,86],"has","were","would",{"id":88,"sentenceTemplate":89,"displayOrder":90,"explanation":91,"exampleSentence":92,"blanks":93,"payload":94},"01a01413-a078-74e9-81b1-693ab004c356","At ten, the technicians had was testing the system for four hours when it failed.",3,"The structure is “had + been + verb-ing”, so “was” must become “been”.","At ten, the technicians had been testing the system for four hours when it failed.",[],{"hint":95,"words":96,"correct":29,"wrongIndex":108,"corrections":109},"Complete the three-part continuous form.",[97,98,23,99,28,100,101,23,102,34,103,104,105,106,107],"At","ten,","technicians","was","testing","system","four","hours","when","it","failed.",5,[29,110,85,111],"being","are",{"id":113,"sentenceTemplate":114,"displayOrder":9,"explanation":115,"exampleSentence":116,"blanks":117,"payload":118},"01a01413-a078-7521-81b1-693ab0e4c590","Maya had been lie awake since midnight when the alarm rang.","Change “lie” to “lying” after “had been”; “since” introduces the starting point.","Maya had been lying awake since midnight when the alarm rang.",[],{"hint":119,"words":120,"correct":127,"wrongIndex":90,"corrections":128},"“Midnight” is the starting point of the activity.",[121,28,29,122,123,58,124,105,23,125,126],"Maya","lie","awake","midnight","alarm","rang.","lying",[127,129,130,131],"lay","lain","lies",{"id":133,"sentenceTemplate":134,"displayOrder":108,"explanation":135,"exampleSentence":136,"blanks":137,"payload":138},"01a01413-a078-7555-81b1-693ab1823a11","The soprano’s voice was hoarse after the performance; she had been sang continuously.","Use “had been singing” for the recent ongoing activity whose result was still audible in her voice.","The soprano’s voice was hoarse after the performance; she had been singing continuously.",[],{"hint":139,"words":140,"correct":150,"wrongIndex":82,"corrections":151},"The activity had only just stopped.",[141,142,143,100,144,145,23,146,147,28,29,148,149],"The","soprano’s","voice","hoarse","after","performance;","she","sang","continuously.","singing",[150,152,153,154],"sings","sing","sung",{"id":156,"sentenceTemplate":157,"displayOrder":158,"explanation":159,"exampleSentence":160,"blanks":161,"payload":162},"01a01413-a078-7589-81b1-693ab1b1fd8a","During the safety briefing, the trainees hadn't been taken notes.",6,"The negative form is “hadn’t been + -ing”, so use “hadn’t been taking notes”.","During the safety briefing, the trainees hadn't been taking notes.",[],{"hint":163,"words":164,"correct":172,"wrongIndex":173,"corrections":174},"The negative describes an activity that was not happening.",[165,23,166,167,23,168,169,29,170,171],"During","safety","briefing,","trainees","hadn't","taken","notes.","taking",8,[172,175,176,177],"takes","take","took",{"id":179,"sentenceTemplate":180,"displayOrder":181,"explanation":182,"exampleSentence":183,"blanks":184,"payload":185},"01a01413-a078-75b5-81b1-693ab2422102","How long had the nurse being treating patients before her replacement arrived?",7,"A duration question uses “How long + had + subject + been + verb-ing”.","How long had the nurse been treating patients before her replacement arrived?",[],{"hint":186,"words":187,"correct":29,"wrongIndex":108,"corrections":197},"Check the auxiliary after the subject.",[188,189,28,23,190,110,191,192,193,194,195,196],"How","long","nurse","treating","patients","before","her","replacement","arrived?",[29,100,198,111],"is",{"id":200,"sentenceTemplate":201,"displayOrder":173,"explanation":202,"exampleSentence":203,"blanks":204,"payload":205},"01a01413-a078-75e9-81b1-693ab2fe178b","Before we became business partners, I had always knowing Leila as a careful negotiator.","Use the simple past perfect with the stative verb “know”: “I had always known”, not a continuous form.","Before we became business partners, I had always known Leila as a careful negotiator.",[],{"hint":206,"words":207,"correct":220,"wrongIndex":173,"corrections":221},"“Know” is a stative verb.",[52,208,209,210,211,212,28,213,214,215,216,217,218,219],"we","became","business","partners,","I","always","knowing","Leila","as","a","careful","negotiator.","known",[220,222,223,224],"knew","know","knows",{"id":226,"sentenceTemplate":227,"displayOrder":38,"explanation":228,"exampleSentence":229,"blanks":230,"payload":231},"01a01413-a078-761d-81b1-693ab3a28678","By noon, all five reports had been writing, approved and sent to the client.","A counted, completed result takes the simple past perfect passive: all five reports had been written.","By noon, all five reports had been written, approved and sent to the client.",[],{"hint":232,"words":233,"correct":243,"wrongIndex":181,"corrections":244},"The exact completed total is the focus.",[234,77,235,236,237,28,29,238,239,240,241,33,23,242],"By","all","five","reports","writing,","approved","and","sent","client.","written,",[243,245,246,247],"writes,","write,","wrote,",{"id":249,"sentenceTemplate":250,"displayOrder":251,"explanation":252,"exampleSentence":253,"blanks":254,"payload":255},"01a01413-a078-7649-81b1-693ab3e071dd","The pilot said the autopilot had been flew the aircraft for an hour.",10,"In reported speech, use “had been flying” for the activity continuing before the later debrief.","The pilot said the autopilot had been flying the aircraft for an hour.",[],{"hint":256,"words":257,"correct":265,"wrongIndex":181,"corrections":266},"The report describes an earlier ongoing activity.",[141,258,259,23,260,28,29,261,23,262,34,263,264],"pilot","said","autopilot","flew","aircraft","an","hour.","flying",[265,267,268,269],"flies","fly","flown",{"id":271,"sentenceTemplate":272,"displayOrder":82,"explanation":273,"exampleSentence":274,"blanks":275,"payload":276},"01a01413-a078-767d-81b1-693ab3e5ab66","I'd been sleep badly for weeks when the doctor suggested a new routine.","In “I’d been sleeping”, “I’d” means “I had” and the activity takes the -ing form.","I'd been sleeping badly for weeks when the doctor suggested a new routine.",[],{"hint":277,"words":278,"correct":286,"wrongIndex":66,"corrections":287},"The contraction describes an activity before a past event.",[279,29,280,281,34,282,105,23,53,283,217,284,285],"I'd","sleep","badly","weeks","suggested","new","routine.","sleeping",[286,288,289],"slept","sleeps","\u002Fuploads\u002Fimages\u002Fgpimg_9897c48a-ba12-48cf-95c9-eb2fafe7d2aa_hero.webp",{"title":292,"slug":293,"language":294,"level":295},"Past Perfect Continuous","past-perfect-continuous","en","B2"]