knowing放在句首怎麼用

1、Knowing Ben， we could be waiting a long time.本這個人我們瞭解，能叫我們等很長時間。

2、Knowing that danger threatened， they were on the alert. 因為知道可能會發生危險，他們處於戒備狀態。

3、Half the fun of gardening is never knowing exactly what's going to come up.園藝的最大樂趣是誰也不知道到底會長出什麼。