fail的几种用法
问题描述：
fail的几种用法
fail in sth
fail in doing sth
fail to do sth
fail sth
答
fail to do sth.没有,不能
fail in（doing）sth.在……方面失败
例如：
I fail to see why you find it so amusing.我弄不懂你们为什么对这件事感到如此好笑.
He never fails to phone his mother on her birthday.每逢母亲过生日时,他都会打电话给她.
The chairman failed in trying to persuade the committee to share his opinion.主席未能说服委员会同意他的观点.
He has been failing in health for the last two years.近两年来,他的健康状况一直在衰退.
fail in sth 和fail st用不能直接用