使我感到惊讶的是他的英语说得如此好

To my surprise that he speaks English so well.

To my surprise, he can speak English so well.

His good spoken English surprised me.

what amazed me is that his english is excellent/awesome!

To my surprise,he speaks English very well!固定句型。"to my surprise"令人感到惊讶的,后跟主句。该句应以“他”作主语，“English”做宾语。主动便可，无需被动。言简意该！

It superised me much that he speaks English so well