I think it must be teenagers having fun.这句话的句子结构是怎样的

I think it must be的意思 my watch doesnt work.I think something must be wrong with it. I think (it) must be our monitor.为什么填it? i think it must be in your room,____?A isn't it B mustn't itC needn't itD wasn't it I think it must be very nice中文 高中情态动词-That must be a terrible mistake .-No.I don't think it __a mistake .A.must be B.mustn't be C.can be D can't be, -whose handbag is this?- It ——Kate,I think.A.must be B.can‘t be C.might be D.belongs to 1.- I think we don’t have enough time.-I think ____.A.that B.so C.neither D.it1.- I think we don’t have enough time.-I think ____.A.that B.so C.neither D.it 2.I didn’t hear the phone.I ___________ asleep.A.must be B.must have been C.should be D I will think it must be John's.这句话对嘛?.整句话是“If I see a CD,I'll think it must be John's.” I can't find my wallet .I think I must have d____ it somewhere I don't think it would be safe ( ) a kite When I saw a story book,I think it must be John 's I think she must be crazy! I think t___ must be very delicious I think you must be crazy. I think you must be learned.翻译 I THINK YOU MUST BE CARZY 解释一下意思：I think he must be moved. don't give up loving him . 谢谢.