forget to do sth 忘记要去做某事 forget doing sth 忘记以前曾经做过某事 例如 Sorry,I forgot to bring the book.(对不起,我忘了带书了.) I forgot borrowing a book from you.(我忘记曾经向你借过书这件事)
forget to do sth是忘了干某事(还没干呢);forget doing sth 是忘了干过的某事(干过,但是忘了)。 比方说, I just forgot to fetch the file. 我忘了拿那份文件。(真的没有拿) I just forgot fetching the file. 我忘了已经拿了那份文件了。(拿了,但是忘了曾经干过这件事)...