Grammar / B2 Grammar lessons and exercises / Modal verbs: Permission, obligation, prohibition, necessity
Fill in each gap with one suitable word or two contracted words (e.g. shouldn’t, mustn’t, needn’t, etc.).
TEACHER: What are you doing here? You are not 1 to be here.
STUDENT: Sorry, I know students 2 not go into the staffroom, but I really need to speak with Mr. Donovan.
TEACHER: Well, you 3 have come in here to talk to him. It wasn't really necessary. You could have gone to the principal's office and asked him to call Mr. Donovan. Actually, that's what you 4 have done.
STUDENT: I'm sorry, I wasn't thinking straight. I really 5 to talk to him urgently.
TEACHER: Well, you'd 6 think straight the next time, OK? Now, if you want to talk to Mr. Donovan, you don't 7 to go to the principal's office. I'll call him myself. And, please, you 8 to take that chewing gum out of your mouth. You know that chewing gum is not 9 on school premises. You 10 better not do it again, or I'll have to send you to detention.
STUDENT: OK, Mr. Harris. Thanks.