He got a thing for you:

他帶點東西給你 ×

他對你有點意思 √

例句：

I think you got a thing for you because he always stares at you.

我覺得他對你有點意思，因為他經常盯著你看。

Play it cool:

面不改色

例句：

It's ridiculous to play it cool if someone you're mad about is mad about you too. 

如果讓你生氣的人也在生你的氣，而你還要假裝冷靜，那就太可笑了。

The cat got your tongue:

貓拿了你的舌頭嗎？ ×

你總得說些什么 √

例句：

Why aren't you answering me, has the cat got your tongue?

你干嗎不回答我，舌頭給貓叼去啦？