go
1.go和come有时可以通用。参见 come 1
2.go的过去分词gone有时被用作形容词，作“已去的”解，如He is gone. is gone着重在“已去”的状态，has gone便着重在“去”的动作。
He looks like a man suddenly gone mad里的gone也是用作形容词。
3.have gone是“已经去而不在这里”的意思，说“已经去（而又来了）”不可说have gone，所以下面各句都不对：
- He has gone often recently.
- He has gone twice this week.
- He has gone only once.
该把各句里的gone改作been away。假使指定到那里去，那末该说He has been at Shanghai often recently和He has been there twice this week等。
have gone既然是“已经去而不在这里”的意思，所以不可说I have gone。这句作“我已经去而不在这里”解，明明在这里才说话或写字，怎能说“不在这里”呢？但I had gone是可以说的，因为在过去的某时“我”是可能“不在这里”的。又When I have gone也是可以说的，因为这个从句指将来，不指现在，在将来的某时“我”是可能“不在这里”的。
比较下面两句：
- He has gone to Beijing. （他已经到北京去了。［也许已经到达，也许尚在路上］）
- He has been to Beijing. （他近来去过北京。［已经回来了］）
4.He has gone for five days是“他已经去了，预备过五天回来”。不是“他已经去了五天”。He has been going for five days是“他已经有五天要去而未去了”。实际不曾去。说“他已经去了五天”该说He has been gone for five days或He has been away for five days。It is five days since he went和He went five days ago都没有“他还未回来”的含意。
5.go往往用现在时态或现在进行时态指将来，如I go to Beijing next Friday和I am going to Beijing next Friday，作I shall go to Beijing next Friday解。
6.go on后面接不定式和接现在分词意思不同，如go on to read lesson ten是“（读完了第九课）接着读第十课”，go on reading lesson ten是“继续读第十课”。go on后面接不定式指一个时刻（a point of time）的动作。例如：At half past three I went on to read lesson ten. go on后面接现在分词指一段时间（a period of time）的动作。例如：For half an hour I went on reading lesson ten.
go on with指一个时刻或一段时间的动作都可以。例如：After a little pause he went on with his speech. 和He went on with his speech for half an hour.
7.注意下面第一句里用to read，第二句里用to reading：
- Having read lesson nine I went on to read lesson ten.
- From reading lesson nine I went on to reading lesson ten.
from...to...里的to是介词。
8.He began to go all sorts of places（他开始到各处去玩）里的go用作及物动词。注意后面是places，假使把places改作schools, theatres等任何其他词，go后面必须加上to。
9.在口语里用作祈使语气或不定式的go后面的不定式有时没有to，如Go ask her和I'll go see my brother。
10.请别人先走时习惯上不说Go first，该说After you。
11.习惯上不说Let me go away for a minute，该说Excuse me a minute。
12.It is going to be fine tomorrow里的is going to...表示或然性。I am going to learn English里的am going to...表示意向。
