I prefer to do it myself.

我宁愿自己做这件事。

I prefer to do the work myself.

我宁愿自己干这工作。

We would prefer to do it later.

我们宁愿以后做它。

You prefer to do his friend.

你宁愿做他的朋友。

CHARLIE: What would you prefer to do?

查理：你喜欢看点什么？