Tham khảo tài liệu 'format test 2', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 155 207 - 208 3 We can use much and many alone without a following noun. You haven t eaten much Did you find any mushrooms Not many D Much and many are used mostly in questions and negative sentences. See 205. 207 must forms 1 Must is a modal auxiliary verb see 202 . There is no -s in the third person singular. He must start coming on time. NOT He musts . . . Questions and negatives are made without do. Must you go NOT Do you must go You mustn t worry. NOT You don t must worry. After must we use the infinitive without to. must write to my mother. NOT I must to write . . . 2 Must has no infinitive or participles. When necessary we use other expressions such as have to. He II have to start coming on time. NOT He ll must . . . ị don t want to have to tell you again. NOT I don t want to-must . . . 3 Must has no past tense We can talk about past obligation with had to. I had to push the car to start it this morning. NOT must push . . . Must can have a past meaning in reported speech see 282 283 . fold her she must be home by midnight. 4 There is a contracted negative mustn t. For weak and strong pronunciations of must see 358. 208 must obligation 1 We use must to give strong advice or orders to ourselves or other people. I really must stop smoking. You must be here before eight o clock. In questions we use mustỉo ask what the hearer thinks is necessary. Must I clean all the rooms Why must you always leave the door open Must not or mustn t is used to tell people not to do things. You mustn t open this parcel before Christmas Day. 209 156 2 We can also use have got toto talk about obligation. See 156. For the difference between must and have got to see 209. 3 Must is not used to talk about past obligation must is used mainly for giving orders and you cannot give orders in the past . For the use of had to see 156. For the difference between must not and don t have to haven t got to don t need to and needn t see 209. 209 must and have to mustn t haven t got to don t have to
