is being 和are being适合什么时候用?请举例附加提问:过去式could后面不用pat tense 比如:i could dance very well when i was still young..

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is being 和are being适合什么时候用?请举例附加提问:过去式could后面不用pat tense 比如:i could dance very well when i was still young..
is being 和are being
适合什么时候用?请举例
附加提问:过去式could后面不用pat tense
比如:i could dance very well when i was still young..

is being 和are being适合什么时候用?请举例附加提问:过去式could后面不用pat tense 比如:i could dance very well when i was still young..
is being 和 are being 都是被动语态的正在进行时态 .
is 和 are的使用取决与主语的人称数:一般情况下,第三人称单数就用 is ;you 及复数就用 are 了:
eg:
You/they are being told how to dance by the teacher at the moment (now).
She is being told how to dance by the teacher at the moment (now).举了同样的例子便是为了于对比区别.
下面的句子是正确的:I could dance very well when I was still young..
英语只要掌握基本的语法知识,多读就可以学的很不错的(个人意见)

i could dance very well when i was still young..
这句对
is being 和are being 主语单复数不同
过去式could后面不用pat tense 吗? 没看懂

这句话是虚拟句