高一英语 非谓语动词 选择题疑问

从句可以与非谓语动词互换。
If you check your composition carefully,you can at least avoid some spelling mistakes。
=Checking your composition carefully,you can at least avoid some spelling mistakes。
=Check your composition carefully,and you can at least avoid some spelling mistakes。
Having checked 表示检查的动作在先,避免拼写的错误在后,语意错。应该的检查的时候就可以避免拼写错误,所以用 checking,不用having checked 。
再问： 如果改为when you check,对不对呢
再答： 可以的，只是由if引导的条件状语从句变为了when引导的时间状语从句，2种情况都可以变成非谓语动词的句子形式。 If you check your composition carefully, you can at least avoid some spelling mistakes。 =Checking your composition carefully, you can at least avoid some spelling mistakes。 如果你仔细检查你的作文，你至少可以避免一些拼写错误。 When you check your composition carefully, you can at least avoid some spelling mistakes。 =Checking your composition carefully, you can at least avoid some spelling mistakes。 当你仔细检查你的作文，你至少可以避免一些拼写错误。