welcome到底怎么用？有时候看到加to的，有时就加back，有时好象就加名词吧？

welcome 可以作名词 We gave our foreign teacher a warm welcome.
作动词 The foreign teacher was welcomed at our school.
做形容词 You're welcome.
后加to 表示‘欢迎到...' 作动词
后加back 表欢迎回来

welcome到底怎么用？后面是加to还是加back还是直接加名词，看一看下面的公式，相信你就会了：

1.welcome + to + 名词

2.welcome + 副词

3.welcome + 副词 + to + 名词

看到啦？只要后面有名词，其名词前面就要加to.

例如：

1.Welcome to school.(school就是名词）
2.Welcome back home.(back就是副词,home在这儿也是副词）
3.Welcome back to school.

Welcome to Suzhou
Welcome back to Suzhou
Welcome home.
Welcome back home.
有没有to取决于后面的单词。

if a stranger comes to your place ,
you will use "welcome to ...." to show your kindness.

if your sister/brother comes back after a long journey,
you will use "welcome back " instead of "welcome to ...",don't you?

就是要看见一个记住一个，语言没什么特别的规律