其基本构成是:have/has+done;过去完成时是指:在过去某个特定时间点或动作之前就发生的行为,即过去的过去。其基本构成是:had+done。 那为什么我们要在写作中适当加入完成时呢?因为多种时...
A. do B. to do C. doing D. done 3、Some cities have passed laws that allow coal and oil ___only if their sulfur content is low. A. burning B. to burn C. being burned D. to be burned 4、The team really looks good tonight ,because the coach had them_...
注意使用情境和使用的语气,要不然很容易产生误会。 Do youcarrycamera? carry在这里是“出售”的意思 -\- If a shop carries goods or products, it has them for sale. There are 4 mod...
15. 将来完成时(will have done) ①表示一个动作到将来某个时间为止已经完成,强调对将来那个时间产生的影响。 例:Pick me up at 8 o'clock,I will have had breakfast by then. 早上8点...
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