说过去发生的事件(例如:用过去时间状语),我们通常不用现在完成时。
If we say when a past event happened (for example, by using time-adverbs), we do not usually use the present perfect.
下面的这些句子摘自课文,仔细地研究这些例句,特别要注意现在完成时句子中表示时间的状语(用斜体印出)。
These sentences are from the passage. Study them carefully. Pay close attention to the words in italics.
下面的这些句子摘自课文,仔细地研究这些例句,特别要注意现在完成时句子中表示时间的状语(用斜体印出)。
These sentences are from the passage. Study them carefully. Pay close attention to the words in italics.
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