is,am,are,was,were,being,been,to be怎么用

原来缘错 1年前 已收到1个回答 举报

焉得心心相印 幼苗

共回答了18个问题采纳率:100% 举报

is am are 用在一般现在时的句子中
were was 用在一般过去式的句子中
being 可以和别的助动词构成别的时态,例如will be beding.../have been being...
been to 用在have/has been to中 意为曾经到过.
to be一般用在非谓语中,例如, there are so many things to be done.

1年前

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