MUST 后面的时态E.g.The teacher said,“John,you must bring your book to the class=The teacher told John that he must bring his book to the class.第2句的MUST,后面的BRING用的是一般现在时,那是不是MUST后面的动词一定用一般

MUST 后面的时态E.g.The teacher said,“John,you must bring your book to the class=The teacher told John that he must bring his book to the class.第2句的MUST,后面的BRING用的是一般现在时,那是不是MUST后面的动词一定用一般 这句before后面从句时态的用法是怎么回事?you must first establish the primary cause of waste generation before attempting to find solutions. 这句话时态不对吧?they must have been several hundred people present just before the show began.后面那句是过去时,但是前面那句是现在完成时,连着现在的,怎么可能before? She must be sent (must sent) to the hospital时态时态转换是否正确？ 现在完成时态的被动语态结构主语+be+动词过去分词+其他e.g:The story has been forgetten by them请另外再造几个例子, 一道《编译原理》求follow集题目,v文法G[E]:E→T E’→+TE’| e T→FT’ T’→*FT’| e F→(E)|i FOLLOW(E’)=FOLLOW(E)={#,)}怎么求得的? The policeman asked the boy后面的句子应该用什么时态 the sky never clear还是the sky never clearsnever 影响后面的时态吗?仔细讲讲 moment 的后面结什么时态,比如at the moment I______(type)the letter Te amo!Eu a mo voce!那后面的呢 in 后面加时间用什么时态?比如The plane (take off) in a moment.这样in后面加时间,还有什么样的?这种应该用什么时态? tell/ask sb.是什么结构e.g The policeman said to me,Be careful of the car.-------The policeman told me to be careful of the car.由此句可知，当要转述的是表示肯定意义的祈使句时，变成间接引语时一般可以转化为te It is the last time后面的从句应用什么时态? 情态动词没有时态,那么这句话的must是表达情态动词么?It must have rained yesterday.这句话中must是否是情态动词?如果是,那后面have rained不是现在完成时么?这算用了时态了吧?如果must不是情态动词 te-yut-te的中文. 求Tra Te E Il Mare 的URL 宾语从句的时态I thought that 后面是跟现在式还是过去式?若为过去式,情态动词must,can怎么办? when后面的句子 用什么时态