想请问各位,要如何学好grammar问题?还是可以请各位高人可以教我吗?
例如:1.to后面要放回原本字
2.正在进行式是ING
3.也有分past tense and present tense
还有什么是需要注意的呢?
PS:还有一个问题,have been?had been?has been?
been是在什么情况用的呢?
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Grammar问题 |
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