quit doing，就是quit後面加doing，意思是放棄做某事。同義短語是give up doing，也是放棄做某事。

quit後面加something或者是doing something.quit是名詞、及物動詞、不及物動詞、形容詞,作名詞時意為“離開;[計]退出,人名;(英)奎特”,作及物動詞時意為“開;放棄;停止;使…解除”,作不及物動詞時意為“離開;辭職;停止”,作形容詞時意為“擺脫了…的;已

quit作為動詞的用法

1. VERB 放棄，辭去(工作) If you quit your job, you choose to leave it.

【例句】

He quit his job as an office boy in Athens...

他辭去了在雅典當辦公室勤雜工的工作。

He figured he would quit before Johnson fired him.

他估計自己會在約翰遜炒他魷魚之前先辭職。

2. VERB 停止;退出;放棄 If you quit an activity or quit doing something, you stop doing it.

【例句】

A nicotine spray can help smokers quit the habit without putting on weight...

尼古丁噴霧劑能夠幫助吸菸者在不增加體重的同時戒菸。

I was trying to quit smoking at the time.

當時我正在努力戒菸。

3. VERB 離開(某地) If you quit a place, you leave it completely and do not go back to it.

【例句】

...the idea that humans might one day quit the earth to colonise other planets...

人類有朝一日可能會離開地球到其他星球定居繁衍的想法

Police were called when he refused to quit the building.

他拒絕離開那座大樓，於是人們叫來了警察

加doing

造句：1.Mrs. Johnson phoned the repairman because her dishwasher quit working.約翰遜太太的洗碗機壞了，她打電話叫修理工來。

2I was trying to quit smoking at the time.當時我正在努力戒菸。

3It's not easy to quit smoking cigarettes

戒菸並非易事。