日语
韩语
法语
德语
西班牙语
意大利语
阿拉伯语
葡萄牙语
越南语
俄语
芬兰语
泰语
1. 名词作主语，有时句中使用形式主语it而将真正主语（动名词）放到句尾。常用的结构有：
It is +n. + doing.
It is + adj. + doing
There is (was) no doing(=It is possible to do…).
It is no use writing to him; he never answers letters.
It is good playing chess after supper.
There is no holding back the wheel of history.
It is +n. + doing.
It is + adj. + doing
There is (was) no doing(=It is possible to do…).
It is no use writing to him; he never answers letters.
It is good playing chess after supper.
There is no holding back the wheel of history.
