be able to 什么时候要变成ia／are able to

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推荐答案 2014-12-11

在一般现在时里，如果句子主语后没有其他动词是就直接用is are。如果句子中有了动词，其后要用时就用be able to. can may must will be gong to后都要用原型动词。追问

懂了不好意思噢已经采纳了

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第1个回答 2020-04-24

在一般现在时里，如果句子主语后没有其他动词是就直接用is are。如果句子中有了动词，其后要用时就用be able to. can may must will be gong to后都要用原型动词。

第2个回答 2014-12-11

要看前面的主语是复数还是单数。第一人称用am,was,第三人称单数用is,was,复数用are,were.追答

前面要是you,后面用are,were.

第3个回答 2014-12-11

第三人称单数is
第一第二第三复数are追问

怎么判断直接用be还得换成is

追答

would will should 后面就是be

第4个回答 2014-12-11

看主语的单复数追问

怎样判断直接用be 还是得换成is

追答

这个就比较麻烦了，如果前面的词能让后面的词做原形，就用be

比如can，must，should

其他就是单数用is，复数用are

说我（I）的时候用am

追问

所以像这个第八题是不是用is able to呢

追答

把be改成is

你这个竟然不会，这应该是初一年才学be的用法

追问

谢谢了

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