1. depend on 依赖

All living things depend on the sun for their growth.
万物生长靠太阳。

But that all depend on the specific circumstances.
不过，那要看具体情况而定。

情景对话：

A: I don't know whether I can win her heart. 我不知道是否能赢得她的欢心。

B: She dreams to be rich, so it depends on your fortune. 她做梦都想有钱，所以这要看你的财力了。

2. God knows 天知道！

He went God knows where.
他去的地方没人知道。

He is living God knows where.
天知道他住在哪儿。

情景对话：

A: Where should we find him? 我们该到哪儿找他呢？

B: God knows. 天知道！

3. count ...as...将...视为...

I count him as being very reliable.
我以为他是很值得信赖的。

I count you as one of my friends.
我把你算作我的一个朋友。

情景对话：

A: Alice went through big difficulities. 爱丽丝经受了很多困难。

B: Yeah, as a friend of her, I count it as a personal favour. 是啊，作为她的朋友，我感同身受。