I am leaving Laos Angeles tomorrow. 我明天要离开洛杉矶。
I am leaving for Laos Angeles tomorrow. 我明天要动身去洛杉矶。
这两句话就一字之差，第二句多了一个for，为什么意思差别这么大呢？这确实是个很有趣的问题。
第一句 leave 是及物动词，Laos Angeles 是其宾语，意思是“离开洛杉矶”。第二句leave用作不及物动词，后面跟介词for，表示“方向和目的地”，意思是“（离开某地）动身去洛杉矶”。所以，就出现了上面截然不同的两种含义。一字之差的结果是：方向和目的地完全变了。
有网友读者可能要问，表示“方向或目的地”，有时用for，有时用to，经常分辨不清。这需要特别记忆才行，一般说来，for和下列表示“离开，启程”的动词搭配：
He left for Shanghai this morning. 他今天早上动身去上海了。
They are starting for Europe. 他们就要启程赴欧洲。
I will sail for Japan next month. 我下月要乘船去日本。
She set out for Washington last week. 她上周到华盛顿去了。
We are off for Blackwater tomorrow. 我们明天去黑水公司。
The sun was sinking as we turned for home. 太阳落山时，我们就回了家。
Mr. Smith departed for the bank. 史密斯先生离开后去了银行。
We left our bags in the station and made straight for the shipyard. 我们把行李放在车站，直奔船厂。
The thirsty animals headed for a place where there was water. 干渴的动物向有水的地方走去。
用在交通工具，如在“车、船、飞机”等词后作定语，表示“去向”的含义，也要用for：
The train for Beijing leaves at ten in the morning. 开往北京的列车在早上10点发车。
This is a ship for London. 这是驶往伦敦的船只。
注意，在下列情况下，表示去向的不及物动词，介词用 to，例如：
They went to the park for a walk 他们去公园散步。
The manager usually drives to his company for work. 经理通常驾车去公司上班。
When they got to the railway station，the train had already left. 当他们到了车站时，火车早已开走。
He flew to New York yesterday. 他昨天乘飞机去纽约了。
还有come to，walk to，run to，ride to，return to，move to，march to，rush to，dash to等，就不再一一列举了(
下列名词也常跟 to 搭配：
This is the shortest way to the airport. 这是去飞机场最近的路。
I couldn't find the entrance to the valley. 我没有找到通向山谷的入口。
They were on the road to the village. 他们正走在去村庄的路上。
The only access to that ancient castle is along a muddy track. 到那座古老城堡去的唯一通道是一条泥泞小路。
leave to 英[li:v tu:] 美[liv tu]
留某事给…处理
[例句]And that means all of us : no disrespect , but it 's far too important to leave to our friends in the it department alone.
这个是指我们所有人：没有任何不敬，只是这个太重要了以至于不能把它们仅仅留给我们it部门的兄弟们。
leave for 是出发至某处
如: he left for beijing yesterday.
leave sth for sb 是把什么留给什么人
如:she left these flowers for you.
leave sb for sb 是离开什么人去和什么人在一起
如:he left his wife for a young lady.
leave sth to do sth 是指为做某事离开某处
如:he left her house to catch the last bus.
leave sb doing sth 是让某人单独做某事
如:don＇t leave your children playing with fire.
瞬间动词不能用进行时.表示一种行为的结果.如come. go. marry. die等.如果能清楚的分清[come了"[还没come".[去了"[还没去".[结婚了"[还没结".[死了"[还没死".而没有当中的过渡.就是瞬间动词
你好！
leave to 留给，交托
leave for 动身去.....;把...留给某人去做！
希望能够帮到你！
leave to 把什么时留给别人
Leave it to me.交给我吧。
leave for 是出发至某处
如:He left for Beijing yesterday.
leave for 是出发至某处
如: He left for Beijing yesterday.
leave sth for sb 是把什么留给什么人
如：She left these flowers for you.
leave sb for sb 是离开什么人去和什么人在一起
如：He left his wife for a young lady.
leave sth to do sth 是指为做某事离开某处
如：He left her house to catch the last bus.
leave sb doing sth 是让某人单独做某事
如：Don't leave your children playing with fire.
瞬间动词不能用进行时,表示一种行为的结果,如come, go, marry, die等.如果能清楚的分清“come了”“还没come”,“去了”“还没去”,“结婚了”“还没结”,“死了”“还没死”,而没有当中的过渡,就是瞬间动词.