肯定句：There
is
....
如：There
is
a
book
on
the
desk
.
否定句：
There
isn't
.....
如：There
isn't
a
book
on
the
desk
.
一般疑问句：Is
there
...
?
如：
Is
there
a
book
on
the
desk
?
肯定回答：Yes,
there
is
.
否定回答：No,
there
isn't
.
分析：
There
be
结构的肯定句就是：There
is
/
are
...
其否定句是直接在BE后加not
.
一般疑问句是直接把be
提到句子前面。
肯定回答：Yes,
there
is/are
/was
/
were
.
否定回答：No,
there
isn't
/aren't
/
wasn't
/
weren't
.
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