If he comes back, I'll eat my hat.'

假如他回来了，我就把我的帽子给吃了。”

I'd eat my hat if Marcus had time to make cheesecake.

如果马可斯有时间做芝士蛋糕我就把帽子吃了。

" He's not a diamond merchant, Sir, " he said, " or I'll eat my hat" .

“他不是钻石商人， 先生，” 他说，“否则我会吃掉我的帽子” 。

If your mother didn't know perfectly well the measurements of the living-room windows I'll eat my hat.

如果你妈妈不知道起居室窗户的尺寸， 我会吃掉我的帽子。