to think of

• 想出办法

  think of a way

• 想出借口

  come up with an excuse

• 想出个理由拒绝就算了

  think of a reason to refuse

• 想不出是什么道理

  can't think for what reason

• 他想不出别的办法。

  He couldn't think of any other way.

• 我想了半天也没有想出个主意来。

  I thought about it for some time but I couldn't come up with an idea.