这些词均可表示承认：

1. Admit指不情愿地承认某种（通常为不好的）事实，且该事实往往与自己有关：

    e.g. He admitted that it was a tragic thing. 他承认那是一个悲剧。

2. Acknowledge表示接受或承认某种真实存在的事物或事理：

    e.g. They acknowledged that it would not violate the law.他们承认它不会违反法律。

3. Concede指不得以承认某种事理，可带双宾语：

    e.g. The landlady conceded me the right to use the microwave oven.

    女房东承认我有权使用微波炉。

4. Confess多指承认或坦白对己不利或令人窘迫的事情，如罪行、失误等：

    e.g. I must confess that I’m at my wit’s end.

    我必须承认我现在智穷计尽了。

Acknowledge：e.g.

1. Acknowledge the failure of the plan承认计划失败

2. Acknowledge it to be a great success承认那事干得很成功

3. He acknowledged that he was wrong. (or He acknowledged himself to be wrong.)

    他承认自己错了。

4. He acknowledged my arrival with a grunt.他咕哝了一声，表示知道我来了。

5. That student walked right past his teacher without even acknowledging him.

    那个学生从他老师面前走过，连招呼也不打一个。

6. Acknowledge a debt承认债务有效

Admit：e.g.

1. The shooting victims were admitted to the local hospital.

    枪击受害者被送入当地医院治疗。

2. Our auditorium admits 3,000 persons.我们的礼堂可以容纳3000人。

3. The matter admits of no delay.这件事不容拖延。

4. This gate admits to the yard.这道门通向院子。

5. Admit to robbery承认抢劫

Concede：e.g.

1. Concede a point in an argument 在辩论中承认对方某一点

2. Concede that the statement is true 承认说法正确

3. He vowed never to concede defeat.他立誓不认输。

4. Concede a right to sb.给某人权利

5. Concede a goal输一球

6. Concede to sb.对某人让步

Confess：e.g.

1. Confess one’s guilt (or confess that one is guilty)认罪

2. Confess to a weakness承认缺点

3. Confess to having done (doing)sth.承认干了某事

4. Confess and avoid自认而又持异议