what did he say? what did he tell you?为什么“say”和“tell”不用过去式,“said”、“told”?

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what did he say? what did he tell you?为什么“say”和“tell”不用过去式,“said”、“told”?

what did he say? what did he tell you?为什么“say”和“tell”不用过去式,“said”、“told”?
what did he say? what did he tell you?
为什么“say”和“tell”不用过去式,“said”、“told”?

what did he say? what did he tell you?为什么“say”和“tell”不用过去式,“said”、“told”?
do/ did 是助动词,助动词后面的动词(像你说的say和tell) 都是原形,不需要变成过去式.
e.g.What did he do last night
Why did she laugh

前面的助动词“did”是用过去式,后面要加动词原形的