1.turn to 求助于；变成；转向

Where's your book? Take it out and turn to page 4.
你的书呢？拿出来，翻到第4页。

There was no one to turn to, no one to tell.
没人可以求助，没人可以诉说。

2.propose to 建议

We propose to furnish our own house according to our own taste.
我们建议按自己的爱好布置自己的房子.

I propose to set off immediately.
我建议马上动身。