He does his homework every evening.=He （做功课）什 么 his homework every evening.
They treat us with candies.=They （请我们吃）啥 us candies （糖果）啥 啥
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He does his homework every evening.=He does his homework every evening.
They treat us with candies.=They treat us with candies 或 They buy us candies to eat.