[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"grammar-page-en-musthave-to-modals":3,"grammar-exercises-by-page-019b84a8-b6cc-7649-b832-969ce8dd0933":55},{"id":4,"title":5,"slug":6,"content":7,"language":8,"level":9,"displayOrder":10,"grammarTopics":11,"createdAt":49,"updatedAt":50,"generatorCategories":51,"readyImages":53,"ogImageUrl":54},"019b84a8-b6cc-7649-b832-969ce8dd0933","Must\u002Fhave to (Modals)","musthave-to-modals","In this lesson, you will learn how to talk about **obligation** — things that are necessary or required.\nYou’ll also learn an important difference: **mustn’t** (prohibition) is not the same as **don’t have to** (no necessity).\n\n## 1\\. What obligation means\n\nObligation means something is **necessary** or **required** (you cannot choose not to do it).\n\n## 2\\. Using must\n\nWe use **must** to express a strong obligation. It can be **the speaker’s strong instruction\u002Fadvice** (“You must see a doctor”), or it can sound like an **official rule** (signs\u002Fnotices: “Employees must wear ID badges”).\n\nExamples:\n\n* “I must finish this report today.”\n* “You must wear your ID badge in the building.”\n\n(On a sign) “Visitors must wear safety helmets.”\n\n## 3\\. Using have to\n\nWe use **have to** when the obligation comes from rules, laws, or external situations.\n\n**Form (important):**\n\n* Affirmative: I\u002FYou\u002FWe\u002FThey **have** to… \u002F He\u002FShe **has** to…\n* Negative: I don’t **have** to… \u002F He doesn’t **have** to…\n* Question: **Do** you **have** to…? \u002F **Does** he **have** to…?\n\nExamples:\n\n* “I have to wear a uniform at work.”\n* “We have to show our passports at the airport.”\n\nNote: The past form of “have to” is **had to** for obligations in the past.\n\n* I had to work late yesterday.\n* I didn’t have to work last weekend.\n* Did you have to pay for the ticket?\n\nWe don’t usually use **must** for the past; we use **had to**: ‘I had to leave early yesterday.’\n\n## 4\\. Must vs\\. have to: meaning difference\n\nRule of thumb: **must** often sounds **stronger\u002Fmore personal** (or more formal in notices); **have to** is common for **facts, rules, or situations**. In many everyday sentences, both are possible with little difference.\n\nCompare how the source of obligation changes the meaning.\n\nExamples:\n\n* “I **must** study tonight.” → Personal decision.\n* “I **have to** study tonight.” → The situation requires it.\n\n## 5\\. Negative forms \\(important difference\\)\n\nThe negative forms have very different meanings.\n\nExamples:\n\n* “You **mustn’t** park here.” → It is not allowed.\n* “You **don’t have to** come tomorrow.” → It is not necessary.\n\nTo express **prohibition**, we normally use **mustn’t**, **can’t**, or **(be) not allowed to**: “You mustn’t park here.” \u002F “You can’t park here.” \u002F “You’re not allowed to park here.” **Don’t have to** never means ‘forbidden’—it only means ‘not necessary.’\n\n## 6\\. Key takeaway\n\n* **Must** shows strong, personal obligation.\n* **Have to** shows external obligation.\n* **Mustn’t** means prohibition.\n* **Don’t have to** means no obligation.","en","B1",64,[12],{"id":13,"name":14,"level":9,"language":8,"isCompleted":15,"completionPercentage":16,"totalExercises":17,"completedExercises":16,"vocabularyLists":18},"019aef29-5ca9-7642-a3d4-c2c28b3bc544","Must\u002Fhave to",false,0,2,[19],{"id":20,"title":21,"grammarTopic":22,"displayOrder":23,"vocabularyListWords":24,"isPublished":37},"019bccd6-bbed-709c-b32e-50fe21538765","Modals (Must\u002FHave to)","\u002Fapi\u002Fgrammar_topics\u002F019aef29-5ca9-7642-a3d4-c2c28b3bc544",40,[25,43],{"id":26,"vocabularyWord":27,"displayOrder":38},"019bdbe2-4bb3-7613-b2af-bb969d162bfb",{"id":28,"word":29,"frequency":30,"level":9,"language":8,"partsOfSpeech":31,"audio":15},"019bdbe2-4bad-7943-9a20-be293a65cf28","must",9,[32,39],{"id":33,"partOfSpeech":34,"definition":35,"exampleSentences":36,"isPrimary":37,"meaningOrder":38},"019bdbe2-624a-7d2e-99b7-31d8cf0c5d74","VERB","Used to express necessity or obligation.","You must finish your homework before going out.\nI must remember to call my friend.",true,1,{"id":40,"partOfSpeech":34,"definition":41,"exampleSentences":42,"isPrimary":15,"meaningOrder":17},"019bdbe2-624a-7df2-99b7-31d8cf1e59e5","Used to indicate a strong recommendation or conclusion.","You must try the chocolate cake; it's delicious!\nShe must be very talented to win that award.",{"id":44,"vocabularyWord":45,"displayOrder":17},"019bdbe2-4bb3-7f23-b2af-bb969db87ad2",{"id":46,"word":47,"language":8,"partsOfSpeech":48,"audio":15},"019bcc9b-0baa-7549-95d8-e6f8c8381587","have to",[],"2026-01-03T16:20:08+00:00","2026-07-14T17:37:30+00:00",[52],"grammar_exercise_questions_modality",[],"\u002Fuploads\u002Fimages\u002Fog_019b84a8-b6cc-7649-b832-969ce8dd0933.jpg?v=1784050650",[56,63],{"@id":57,"@type":58,"id":59,"grammarPage":60,"title":61,"instructions":62,"displayOrder":16,"isCompleted":15},"\u002Fapi\u002Fgrammar_exercises\u002F019d365c-870f-79b5-b849-ce52a6aa5c8a","GrammarExercise","019d365c-870f-79b5-b849-ce52a6aa5c8a","\u002Fapi\u002Fgrammar_pages\u002F019b84a8-b6cc-7649-b832-969ce8dd0933","Travel Planning - Must\u002FHave To","Fill in the blanks with 'must' or 'have to'. Use 'must' for personal decisions or strong recommendations, and 'have to' for rules, laws, or official requirements. Click on each blank and choose the correct answer from the dropdown.",{"@id":64,"@type":58,"id":65,"grammarPage":60,"title":66,"instructions":67,"displayOrder":38,"isCompleted":15},"\u002Fapi\u002Fgrammar_exercises\u002F019d365c-8710-754c-8a89-9eff926cf2b6","019d365c-8710-754c-8a89-9eff926cf2b6","Work Requirements - Must\u002FHave To","Fill in the blanks with 'must' or 'have to'. Use 'must' for personal obligation, strong advice, or when the speaker feels something is important. Use 'have to' for rules, laws, or external requirements. Click on each blank and choose the correct answer from the dropdown."]