猜不着 cannot guess; unable to reach [make out] (the right answer); miss one's guess 他使他的对手猜不着他下一步要干什么。 he keeps his opponents guessing what he would do next
犯不着 [口语] not worthwhile; it won't pay 在枝节问题上犯不着花这么多时间。 it isn't worthwhile spending so much time on minor problems
够不着 can't reach; beyond [out of; above] one's reach 她个子不够高, 够不着那些树枝。 she wasn't tall enough to reach those branches. 这书放得太高, 我够不着。 the book's too high -- i can't reach it
用不着 1.(用不上) no need; have no use for 把用不着的书放回书架。 put back the books you are not using on the shelves.2.(不需要) there is no need to; it is not worth while to 用不着为这些小事争论不休。 there is no need to keep arguing about such triflings