What we need to do is我们能否将后面的动词形式改为ing形式,说crushing, making ?
母语人士的回答
Rebecca
不幸的是,您不能在此处使用连续动词。 Crushing, making在语法上不正确,只有crush, make拼写crush, make原始动词crush, make才能出现在这里。如果你想使用verb- ing在这里,你来了句改为what we are doing is crushing the fibers and making them weak enough...示例: What we need to do is mix the ingredients together. = What we are doing is mixing the ingredients together. (您将成分混合在一起。)