I am going to have a test. Knock on wood.
我等一下有考试, 老天保佑.

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在美国的习惯里, 敲木头代表祈求好运的意思, 有些人在讲这句话的时候, 还会用手敲敲头, 真的是很有意思. 总之在你讲一些你自认是很幸运的事情时, 你就可以说 knock on wood. 例如你说, 我差一点就被一台车给撞到, 真是好险, 就是, I almost got hit by a car. Knock on wood. 所以这个 knock on wood 就有点像是中文里"好险" 的那个味道.

Almost screwed up a major event by me.Knock on wood.

I am going to have a test. Knock on wood.
我等一下有考试, 老天保佑.
who bless me

I'm going to have a test. Knock on wood.
Knock on wood.
老天保佑。

knock on wood

I am going to have a test. Knock on wood.

I am going to have a test. Knock on wood.

I am going to have a test. Knock on wood.
我等一下有考试, 老天保佑.

i am going to have a test ,knock on wood
我等一下有考试，老天保佑
i almost got hit by a car ,knock on wood