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19．If he had spent more time practising speaking English before，he _________ able to speak it much better now．（　�。�

A．

will be

B．

would be

C．

has been

D．

would have been

分析如果以前他花更多時間練習說英語的話，那么現在他英語就會說得更好．

解答答案B．
本題實際上是考查錯綜時間的虛擬語氣．if條件句的虛擬有三種情況：對過去的虛擬，從句用had done，主句用could/would/might+have done；對現在的虛擬，從句用did，主句用could/would/might+do；對將來的虛擬，從句用did/were to do/should+do，主句用could/would/might+do．由從句中的had spent可知從句與過去事實相反；由主句中的now可知主句與現在事實相反，故用would be．故答案選B．

點評本題實際上是考查錯綜時間的虛擬語氣．當主句與從句的動作發生在不同的時間，這時主、從句謂語動詞的虛擬語氣形式因時間不同而不同，這叫做錯綜條件句．這時可以根據時間狀語和if條件句虛擬語氣中動詞的變化形式加以辨別．

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