1.不及格
v. 不及物动词：
1.失败
2.不及格
3.失灵；失去作用
4.（指健康）衰退；变弱；消失
5.破产；失去支付能力
6.缺乏，不足；（作物）歉收
及物动词：
1.失败；不能；忘记[ to-v]
2.没有通过（考试），评定（学生）不及格
3.使失望；有负于
4.舍弃（候选人等）
词形变化
- 时态 failed，failing，fails
- fail to do something; leave something undone
- judge unacceptable
- disappoint, prove undependable to; abandon, forsake
- become bankrupt or insolvent; fail financially and close
- fall short in what is expected
- get worse
- prove insufficient
- fail to get a passing grade
- stop operating or functioning
- be unsuccessful
- be unable