考试重点:一般现在时(if 从句和as soon as 从句);进行时表将来;现在完成时和现在完成进行时的区别;完成时瞬间动词以及have (has) been, have (has) gone的区别;过去完成时的时间状语;将来完成时。一、一般现在式 1、表示经常发生的动作或存在的状态:常和always, u
the seriousness of the environmental problems has gone beyond the individual country's ability to solve. The environment has been polluted for hundreds of years by all the ...
更多内容请点击：成人学位英语考试常考语法:动词的时态 推荐文章