Wonder

 『過去式』 表示『客氣』、『委婉』的請求~~~

I was wondering if/whether

example

I was wondering if I could use your computer. 我想知道能不能用一下你的電腦

I was wondering if I could borrow your car tomorrow. 我在想我明天能不能借你的車

I was wondering if you could give me some information about places to visit in the area?  你能不能幫我推荐一下這一帶比較好玩的地方？

 I was wondering what to do about dinner. 我不知道晚飯做什麼

 I was wondering how to get to the stadium.  我不知道怎麼去體育館

We were wondering if you'd (=would) like to join. 我們在想你要不要加入?

A: I wonder what he's thinking.  我不知道他在想什麼

B: There's no telling.= You never know. 難說。