这个句子“It Must Have Been Love”说的是什么意思?

这个句子“It Must Have Been Love”说的是什么意思? You must always be careful with it.怎样用英语解释这个句子? 6.---Was that new school master who walked by --- _____.A.It must be that B.It must have beenC.He must be D.This must have been请问这个题为什么选B must＋have done 句型must＋have done 表对过去发生事情有把握推测.但是可不可以用must +be 这样的句子来表示?比如说 He must have made it for you.可以变成 He must be made it for you 另外 疑问否定中的can't/could 这个句子中的not least啥意思啊?If the tradition of ambition is to have vitality,it must be widely shared; and it especially must be highly regarded by people who are themselves admired,the educated not least among them.翻译：如果雄心 It Must Be?歌词 it must be I parked my car right here but now it's gone.It ____ .A must have been stolen B must have stolenC may be stolenD must be stolen it must still be there这个句子中still的用法?我想问一下still 的位置的用法，still在be i think that we must be talking about it in private 这个句子错了吗?错在哪里?be 后面是n吗 句子My friends and I think it must be teenagers having fun.中 为什么最后的have要用动词ING形式 这个句子是什么语法现象?its motions must certainly be directed by invariable laws; and could we imagine another world,it must also have constant rules其中的and could we imagine another world,为什么情态动词could可以放在主语 几个含must的句子 的反意疑问句1.You must phone your father.2.You mustn’t smoke in the office.3.You must be thirsty.4.You must have known it.5.You must have seen the movie last night. it must be teenagers ___ fun.A.have B.having C.had D.to have must be must have done 区别 Will you answer the phone?It could be your mother.怎么分析这个句子的成分?特别是could be情态动词后面+be是什么意思？He must be over sixty now.也是情态动词+be must be,must和have be,have的区别 you must keep it a secretyou must keep a secret 这个句子对吗?