You'll buy nothing but trouble if you buy that house, take my word for it.

你如果买了那幢房子，买到的只有麻烦，相信我的话。

Take my word for it, I'll give you a lesson that you'll remember for a long while.

相信我的话，我会给你一个教训，你会记得很久。

You can take my word for it.

你可以完全相信我的话。

Don't take my word for it.

不要就这么相信我的话。

For now, just take my word for it.

现在先记住我的话好了。