(3)当我们要强调过去确实使用了某种能力时,要用was(were)able to,而不用could。was able to 表示“设法干成某事”,即succeed in doing sth.或manage to do sth.而could只表示“具备某种...
从句:If+主语+were to do/should do/动词过去式(be动词用were) 主句:主语+should/would/might/could do 如:If it were Sunday tomorrow,my brother would go skating at the Beihai Park.如果明天是星期天,我弟弟会去北海公园滑冰的。
1.陈述语气:I like apples我喜欢苹果。(肯定) I don't like apples我不喜欢苹果(否定) 2.疑问语气:What's your name?你叫什么名字? Do you like apples?你喜欢苹果? 3.祈使语气:Open th...
(2) Does Cathy go to school early? Do you know? Do you know if /whether Cathy goes to school early? 注意:只能用whether而不用if的三种情况如下: ①与or not连用:They asked us w...
虚拟语气主要分为与现在事实相反,与过去事实相反以及与将来事实相反三个种类。让我们一一来看下它们的结构和用法吧! 1、表示与现在事实相反的情况 从句:If+主语+动词一般过去时(Be动词用were) 主句:主语+ should/would/might/could+do: If I were you,I would take an...
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