swear to
片語動詞所屬單字swear
swear to — 片語動詞
1. To promise very seriously that something is true or that you will do something.
1.片語動詞
釋義
鄭重保證
To promise very seriously that something is true or that you will do something.
例句
I can swear to the fact that I saw him at the library.
The witness swore to tell the whole truth in court.