1.The problem is too hard for him to work out.
= The problem isn't easy enough for him to work out.
=The problem is so hard that he can't work out.
2.She is too young to do the work.
= She isn't old enough to do the work.
=She is so young that she can't go to school
3.The box is so heavy that I can't carry it.
= The box is too heavy for me to carry.
=The box is not light enough for me to carry
4.He is too short to catch it.
=He is so short that he can't catch it.
=he is not tall enough for him to catch it.
5.We walk too slowly to get there on time.
=we walk so slowly that we can't get there on time
=we don't walk fast enough to get there on timetoo……toso……thatnot……enough 三個句式都造5句5個同義句里面都有這三個句型的啊，哦能不能直接造你把這些句子去掉等號就等于直接造了啊ok