If you don't mind my saying, you are a(n) excellent / outstanding / superb + (noun phrase)

如果你不介意我说的话，你是一个优秀的/杰出的/卓越的+（名词短语）

I must say you really know how to + (verb)

我必须说你真的精通做+（动词）

You are a fine + (noun phrase)

你是一个很棒的+（名词短语）

What a(n) excellent / outstanding / superb / + (noun phrase) you are!

你真出色/棒/赞＋（名词短语）！

I admire your ability to + (verb)

我钦佩你的+能力（动词）

Mr. Smith, if you don't mind my saying, you are an excellent public speaker.

史密斯先生，如果你不介意我说的话，你是个出色的演说家。

I must say you really know how to paint.

我必须说你真的精通怎么画画。

I admire your ability to think on your feet.

我很钦佩你脚踏实地的思考能力。

You're great at (verb + ing)

你在...方面很棒（动词ing形式）

You can really (verb)

你真的可以（动词）

Wow, I wish I could (verb) as well as you!

你很擅长（动词+ing）

You're an amazing / awesome / incredible + (noun phrase)

你是一个了不起的/超赞的/不可思议的+（名词短语）

Wow! You're great at skiing!

哇！你真的很擅长滑雪！

You can really cook. This is amazing food!

你真的很会做饭。这食物棒极了！

You're an awesome student.

你是一个出色的学生。