1．There be结构的否定形式是在be动词的相应形式后加“not”，其疑问句式是把be动词的相应形式移至句首。例如：
There were two pictures on the wall yesterday．
There weren't two pictures on the wall yesterday．
Were there two pictures on the wall yesterday ？
此时应注意：（1）把含有some的肯定句变为否定或疑问句时，应将其变为any；（2）在对there be结构的一般疑问句作简略回答时，答句的主语仍用there。例如：
There are some oranges on the tree．
There aren't any oranges on the tree．
—Are there any oranges on the tree？
—Yes，there are．／No，there aren't．
2．若对There be结构中的主语进行提问时，无论主语是单数还是复数，习惯上都用“What's＋地点状语”，引导词there常省去。例如：
There are some flowers on the desk．
→What's on the desk？
There is some meat on the plate．
→What's on the plate？
3．There be结构的陈述句变成反意疑问句时，其附加问句的主语应用there，而不可用其它词替代。例如：
There's a beautiful flower on the floor，isn 't there？
There aren't any books in the box，are there？
