1.他工作得太慢无法完成这件事。
He works too slowly to finish the work. 太慢而无法完成
He doesn't work fast enough to finish the work.不够快而无法完成
2.Bob够用功可以通过考试。
Bob is hard-working enough to pass the exam. 足够用功以至于能通过考试
enough....to 是说某人在某方面符合标准而能够去做某事
而too.....to 是说某人在某方面不符合标准而不能去做某事
too+adj./adv. to+v.太...而不能做某事
例:He is too young to go to school.
他年纪太小还不能上学。
2.adj./adv.+enough to +v.足够...而能做某事
例:He is old enough to go to school.
他足够大了能上学了/他已到了上学的年龄了。
3.so +adj./adv.+that从句 如此...以致
例:He is so old that he can go to school. 他已经够上学的年龄了。