therigh
熱心網(wǎng)友
than從句里的事情發(fā)生在過去,而finish他的homework發(fā)生在這個過去的過去,所有是hadFYI
熱心網(wǎng)友
在no sooner...than/hardly...when引導(dǎo)的句子中要用過去完成時,并且no sooner/hardly位于句首時要求倒裝。所以應(yīng)該是____No sooner had he___ finished his homework than the boy was asked to play the piano.
熱心網(wǎng)友
整句話講的都是過去的事情,所以時態(tài)應(yīng)該一致。既用過去完成時,不用現(xiàn)在完成時。