第1个回答 2009-01-09
简单易懂的:
变疑问或否定式时。如果谓语中有be动词的某种形式(am, is, are,was, were)或情态动词(can,may,shall,must等)就把这些词提前可构成疑问;在这些词后直接加not构成否定。
he is a teacher --- he is not a teacher
--- Is he a teacher ?
he can swim ---- he can not swim.
---- Can he swim
而不包含以上那些词时,即实义动词做谓语时,就需要有助动词(do。does。did)来帮助完成
i get up early everyday --- Do you get up early everyday ?
----- i do not get up early everyday.
这里要注意两点,
1.一般现在时态当主语是第三人称单数时,动词用的是三单形式,即动词后加s或es。例如
he gets up early everyday.
变成否定或疑问时要用助动词does。does是do 的第三人称单数形式,已经体现了三单,所以实义动词要还原为动词原形:
he does not get up early
Does he get up early ?
2.同样的道理,当是一般过去式时,要用助动词did。did为do/does的过去式,已经体现了过去时态,所以这时变否定或疑问实义动词需要还原为动词原形
he get up early everyday
he did not get up early
Did he get up early ?
第2个回答 2019-06-09
第一题:
一般疑问:was
lucy
drawing
a
house
when
the
teacher
came
in
?
(把be动词was提到句首即可。)
否定:lucy
was
not
drawing
a
house
when
the
teacher
came
in.
(be动词was后加否定式
not
即可)
第二题:(hace
应该是have
吧)
have
they
ever
met
before?(助动词提前,把never改为ever,意思就是他们从前有见过面吗?)
they
have
not
never
met
before.(同上)
第三题:shall
we
meet
outside
the
school
gate?
(这个是情态动词提前)
we
shall
not
meet
outside
the
school
gate
.
ok.