2.时间状语:recently, lately, since, for, in the past few years, etc。 3. 基本结构:have/has + done 否定形式:have/has + not +done。 一般疑问句:have或has。 4. since的三种用法 1) since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half ...
3) “感使动词”(feel, hear, listen to, let, have, make, see, watch, notice, look at)真奇怪,主动结构“to”走开,被动结构又请来,十个动词要记牢,不会被它再难倒。 We saw him play...
If...should do..., 主语+would have done... ● If she shouldleave, I would have heard about it.如果她要走,我早就应该听说了。 公式126 Should/Were/Had+(从句)主语+谓语 主句if引...
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