they watch tv sometimes这个句子中watch要不要加es,为什么

they watch tv sometimes这个句子中watch要不要加es,为什么 My father watch TV at home中的watch要不要加es 句子：He likes to watch sports games on TV."watch"后为什么不加"es"? They are watching TV watch为什么要加ing 为什么watch时候要加es有时不加es. My father (watches Tv)every night,watch后面为什么要加es Bill often watch TV at night.watch后面加ing还是es?为什么? His parents watch TV every night,.这句话的watch 用加es吗,为什么 He was watch TV.中watch加不加es he wants to watch TV .这watch为啥不加es,不是在肯定句中动词都变单三的吗 they on watch sometimes TV Saturday 连词成句 he does not watch tv为什么要加does