过去将来进行时:( would be doing ) 例:The government promised that a new highway would be being built next July. 政府承诺说第二年7月将有一条新的高速公路正在修建。 15 过去将来完成时:(would have done) 例:I believed by the end of that year an advanced ...
④"be to do"的2种用法: a) 表示“按计划、安排即将发生某事或打算做某事”。 例:She is to be seen in the lab on Monday. 星期一你准会在实验室见到她。 b) 该做或不该做的事情(语气...
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