两者可以互相转换有时用哪个都行.
To keep fit is important.Keeping fit is important.保持健康很重要.
但有时一些习惯用法不能替换.
例如finish doing ,practice doing ,be busy doing 等
而 plan to do ,want to do 等则不可用仰doing.
两者可以互相转换有时用哪个都行.
To keep fit is important.Keeping fit is important.保持健康很重要.
但有时一些习惯用法不能替换.
例如finish doing ,practice doing ,be busy doing 等
而 plan to do ,want to do 等则不可用仰doing.