Every time he asked me to treat him to dinner. I am speechless.
Be lost for words 说不出话来的
I was lost for words when she said that to me.
Mary was lost for words when she was awarded the prize.
Be struck dumb 震惊得哑口无言
We were all struck dumb by my father's announcement that he was resigning from the company.
Why do you get tongue-tied in front of a crowd?
Roll your eyes 翻白眼
When he asked the same question again I saw her roll her eyes.