by的后面加什么詞

　　She'll have had the results by now.

　　她現在應該知道結果了。

　　Day care is provided by the company she works for.

　　她工作的那家公司有日托。

　　All the statistical computations were performed by the new software system.

　　所有的統計計算均由新的軟件系統完成。

　　They won by a single goal after extra time.

　　他們在加時賽中僅踢進一球即獲勝。

　　They've increased the price by 50%.

　　他們已經把價格提高了50%。