2019-2020学年外研版高中英语顶尖课件必修2:Module 4 Period 4
2019-2020学年外研版高中英语顶尖课件必修2:Module 4 Period 4第2页

现在完成时的构成为: 。

感知以下课文原句,完成方框下的小题

◆语法感知

1.It has been six years since we last saw each other. 2.You know,I have seen quite a lot of China and I have visited some beautiful cities. 3.Yes,they have just completed it! 4.They have put up a lot of high-rise buildings recently. 5.Our earth has been polluted heavily so far.

查看答案

have/has+过去分词