I left very early last night, but I wish I hadn't left so early.
我昨晚离开得非常早,但我希望我没有离开那么早。[大学英语六级]
but one day, after heavy shower, I happened to be walking in my garden when I noticed a huge number of snails taking a stroll on some of my prize plants.
后来有一天,一场大雨后,我在花园里漫无目的散步,突然注意到许许多多蜗牛在我的一些心爱的花木上慢悠悠的蠕动着。