asif后加不定式，过去分词，现在分词造句举例

1. asif 后加不定式The old man stood up suddenly, as if to walk out of the door.=The old man stood up suddenly,as if he was about to walkout of the door.老人突然站起来，好像要走出门外。使用条件：１.　主句和从句的主语是一致的（即指同样的人或事物）。２.　从句的动作还没有发生，或表示主句动作的目的。2. asif 后加过去分词He stood as if rooted to the ground.=He stood as if he was rooted to the ground.使用条件：１.　主句和从句的主语是一致的（即指同样的人或事物）。２.　从句的谓语动词是被动语态。3.asif 后现在分词Themansittingoppositemesmiled sweetly, as if remembering something pleasant inthepast.=Themansittingoppositemesmiled sweetly,as if he was rememberingsomething pleasant inthepast.使用条件：１.　主句和从句的主语是一致的（即指同样的人或事物）。２.　从句的动作已经发生或正在进行。