初三英语go down ; go out ; go over ; go by 各是什么意思?有什么区别?

go down
.落下
He got home before the sun went down.
太阳下山前他到了家.
2.下降
The price of eggs has gone down.
蛋价下降了.
3.减弱
The wind has gone down a little.
风势已减弱了一些.
4.被记载
This day will go down in history.
这一天将被记在历史上.
go out
She's gone out for a walk.
她外出散步了.
2.熄灭
His cigarette has gone out.
他的香烟灭了.
3.过时
This method went out long ago.
这种方法早就过时了.
4.过完
The year went out slowly.
这一年慢慢过去了.
go over
1.受欢迎
His speech went over well.
他的演讲很受欢迎.
2.察看
We went over several houses,but haven't bought one yet.
我们看了几栋房子,但尚未买成.
3.重温
He went over the article again.
他把文章从头至尾又读了一遍.
go by
1.经过;(时间)过去
Time went by slowly.
时光慢慢流逝.
2.错过(机会等)
3.依照
Don't go by that old map.
别参照那张旧地图.
4.凭...判断
You can't always go by appearances.
你不能总是根据外表来判断.
区别?I think you can!