She needs to eat healthy food.He needn't hand in his homewor

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She needs to eat healthy food.He needn't hand in his homework today.(看问题补充）
为什么上一句要加to,下一句不要加,eat和hand in不都是动词吗,怎样区分need到底是实义动词还是情态动词?

need作动词时不论是实意动词还是情态动词,意思都是一样的,需要怎么样.
这里你如果无法判断后面要不要to,可以看need的词型.
前一句是needs,说明是实意动词,因为情态动词是没有单复数形势变化的,只能肯定否定.所以后面就用need相应的搭配need to do sth.
后一句是needn't,说明是情态动词,因为如果是实意动词的话,否定就只能用he doesn't need to了,只有在情态动词的时候,才能用needn't的否定方法,所以后面就直接家动词原形.

She needs to eat healthy food.He needn't hand in his homewor A Everyone (人人)needs to be healthy.Do you eat healthy food e He should eat more healthy food He has to eat less food if he wants to keep healthy对画线部分提问 She has to [eat less food] to stay healthy?对括号里的短语提问 I like to eat lots healthy food. 英语翻译Food is very important.Eneryone needs to eat well is he 英语翻译Food is very important.Everyone needs to eat well if he 英语翻译Food is very important .Everyone needs to eat well if he 英语翻译Food is important.Everyone needs to (eat )well if he or Food is very important．Everyone needs to eat well if he want if you want to be healthy,eat only healthy food