如果你要表达的是“在我生日的那天”的话,那么就用on my birthday.
例子:On my birthday,I received a present.
At通常是指某个地方,比如说birthday party.
例子:
1.What food should i have at my birthday party?
2.Did you have fun at my birthday party?
总结:如果要表达“在生日的那天”的话,就用on my birthday.如果要表达“在我的生日派对”的话,就可以用at my birthday [party].
例子:
What should I wear on my birthday?
What should I wear at my birthday party?
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