Know for a certainty that...
确实知道...
🧩 词语组成解析
know
[no]
v. 知道;了解;认识;确信;
n. 知情;
for
[fɚ]
prep. 为，为了;倾向于;关于;当作;
conj. 因为，由于;
🗣️ 情景例句
She has to work late tonight.
她今晚得工作得晚一些。
I'm afraid it's going to be too wide.
我怕它将太宽。
The boy was too nervous to speak.
那男孩紧张得说不出话来。