eat,watch是原形,用在助动词后,如: Does he eat meat? He doesn't watch TV on work days. eats,watches是三单,用于第三人称单数,如: He usually eats meat for lunch. He watches TV only at weekends. eating,watching是现在分词,一般用于进行时,如: He's eating dinner. He's watching TV.
第一句应为 does he like eating apples? 记住, 永远一个句子里(不包括从句)只有一个谓语, 其它若为动词只能动词名词化, 加ing就是其中一种动词名词化的方式 由于前面已有does这个助词, 所以谓语like不需要加s, 但like是谓语, 所以 eating只能名词化 不过这里还涉及了惯用语, like doing sth. 其它动词同...