表達(dá)不清楚用英語怎么表達(dá)？

　　He wants to express his deep sympathy to the family.

　　他想對(duì)那家人表示自己深切的同情。

　　You have to pay a high premium for express delivery.

　　快遞須付高額的附加費(fèi)。

　　How can I ever express my thanks to you for all you've done?

　　對(duì)你所做的一切，我怎么才能表達(dá)謝意？