By the end of June we had treated 30,000 patients.
②在主从复合句中,如果一个动作发生在另一个过去动作之前,
这一动作要用过去完成时。
When I woke up,it had already stopped raining. 8.过去将来时
①表示从过去某时看将来要发生的事情。
The time was not far off when he would regret this decision.
②表示过去习惯性的动作。
Whenever he had time,he would help them in their work. 9.现在完成进行时
①表示一直持续到现在,还可能进行下去的动作。
How long has it been raining?
②表示某动作持续时间太长,有令人疲劳或厌倦等含义。
I have been sitting here all afternoon. 10.过去完成进行时
表示过去某时间之前一直进行的动作。
It had been raining for two days.The fields were all under water. 11.将来进行时
表示将来某时刻正在进行的动作。
I won’t be free on Friday morning.I’ll be seeing a friend off. 12.将来完成时
表示将来某时已完成的动作。
By this time next year we’ll have turned all the land into rice fields. 1.一般现在时
①表示按计划、规定、安排要发生的动作,主要指由时刻表、日程
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