do.
v.做，干，办(某事); 做; 行动; 表现; (问询或谈论时用)进展，进行;
aux. 用于实义动词前构成否定句和疑问句; 构成附加疑问句; 代替实义动词以避免重复；
n.社交聚会; 社交活动。
其他：
第三人称单数：does.
复数：dos.
现在分词：doing.
过去式：did.
过去分词：done.
扩展资料
One major problem did present itself, though.
不过，确实出现了一个重大问题。
Someone might find out, and that would never do.
也许有人会发现，那是绝对不行的。
What do you charge for this type of work?
这种活你收多少钱？
What do you charge for work of this type?
这种活你收多少钱？
