when可作并列连词,常用于引导一个突然出现的动作,意为“那时/这时……”,此时句子的形式如下:1.Somebody was doing something when…; 2.Somebody was about/ going to do something when…; 3.Somebody was on the point of doing something when…; 4.Somebody had ...
There was no telling when she would be back。没法知道她什么时候回来。 2. There is no difficulty in doing sth结构。意为“做某事没有困难”: There is no difficulty in finding his office. 找到了他的办公室没费一点劲。 There was no difficulty in carrying...
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