3. My mother is ill, so I have to go now. 我妈妈病了,所以我现在不得不走了。 人称和时态的变化不同: must 没有人称和时态变化;而 have to 有人称、时态变化,在一般现在时中,第三人称单数用 has to,其它人称用 have to,一般过去时中用 had to。 例如: 1. Lucy must...
5.一般疑问句:have或has提前。 6.例句:I've written an article. It has been raining these days. 六、过去完成时 1.概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。 2.时间状语:before, by the end of last y...
用相应的过去的某种时态(一般过去时,过去进行时,过去将来时,过去完成时)。 Michael said that he would try harder the next semester. Jennifer wondered who had taken her umbrella ...
Great changes have taken place since you left. 宾语从句的时态的用法则是:当主句是一般现在时时,从句的时态可根据从句的时间状语来任意选择;当主句是过去时时,从句的时态则只能用过去时态的某一种,但从句为客观真理时只能用一般现在时。如: She says (that) she ha...
更多内容请点击：精选资源!湘教版八年级英语上册 4 个单元重点短语+句型+语法