错误解析:介词后面不能再接介词。注意一些比较特殊的介词如:towards。 介词短语加了句号错误表达: With the society develops. people begin to realize the importance of biological ...
Do you know if /whether Cathy goes to school early? 注意:只能用whether而不用if的三种情况如下: ①与or not连用:They asked us whether or not we were coming. ②在介词之后:It de...
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