Betty can speak English, but she can't speak Chinese.

贝蒂会说英语，但她不会说汉语。

She can speak English fluently.

她能流利地说英语。

She can speak English every well.

她可以说英语说得很好。

She can speak English, French and Spanish very well.

她的英文，法语，西班牙语说的都非常好。