下面的句子中while后面为什么要加be,she is excited by the idea of online learning while be considers it meaningless and useless.

下面的句子中while后面为什么要加be,she is excited by the idea of online learning while be considers it meaningless and useless. 英语 这里划线句子must 后面为什么要加be seem to be为什么seem 的后面要加to it isn't the way i hoped would be中后面为什么要加be 请问 We just be informed from APL 中 JUST后面为什么要加BE I wish I can be like her,这里can后面为什么要加be?为什么有的句子can后面没有加be？ 应该不算太难的,英语知识：Old people must be looked after well and spoken to politely.这个句子中为什么spoken 后面要加to?to为什么不能省略?如果省略了,会怎么样? 一个句子中有动词前面什么情况下要用be动词?例如下面的句子：while two detectives were keeping guard at the door.two other detectives opened the parcel,前面半句用了BE动词,与KEEP购进过去进行时,后面半句为什 下面的词后面是加句子还是加短语?although,while,even though,whereas,but,despite,yet,likealthough,while,even though,whereas,but,depite,yet,like这些词后面加句子还是短语?是根据词性决定的么?希望能有个通俗易懂的 请问下面的英语句子中,为什么要用is,而后面的play又要加ed呢?这到底是什么时态?They say the heroine is played by Jane Fonda. while后面加什么?when和while的区别? 有些句子中为什么要加be像Do not be afraid.She is be happly.等等这些句子为什么要加be呢? 下面的句子中done+doing是什么用法?Cars designed using computers can be tested as virtual machines first.designed using computers这个定语中,using computers为什么可以加在designed后面?我现在只是高二,很多用法都没见 While waiting,he saw a beautiful girl.这句话有无错误?还有,为什么while后面要加现在分词啊? 过去进行时态中的句子中when和while后面什么时候加过去式什么时候用过去进行时? She deserved to be punished.这句话中to 后面为什么加的是be而不是by? It also has distinction of being the most multicultural state in the USA,having attracted people from all over the world关于句子中 为什么be要加ing它是做什么成分?另外都好后面的have为什么要加ing 而attract却加了ed呢?最 英语介词分别在哪些句子后面加,像be interested in ,be covered by,为什么加in by