comfortable的副詞形式怎么寫

　　He can comfortably afford the extra expense.

　　他支付這些額外的費用毫無問題。

　　They are comfortably ahead in the opinion polls.

　　他們在民意測驗中遙遙領先。

　　Cayton describes himself as comfortably well-off.

　　凱頓把自己描述為生活很富裕。