wasn't 的原形动词,could的否定式?it's的展开形式?
问题描述:
wasn't 的原形动词,could的否定式?it's的展开形式?
答
isn't, couldn't, it is
答
be not;could not;it is/it has
答
was not
couldn't(could not)
it is
答
isn't
could not
it is; it has