He is running
He is sitting
It has a fish
She is reading
a book
既然你說一般現(xiàn)在時,那也可以是
he runs
he sits
she reads a book第三人稱單數(shù)形式不是應該是：一般直接在末尾加ed；以輔音字母加y結尾的變y為i再加ed。嗎？老師是這樣說的那是動詞的過去時才加ed 阿，第三人稱單數(shù)就是動詞後加s，但你應該可以發(fā)現(xiàn)到，這些句子中的主詞，都不是第三人稱單數(shù)，亦即都不是 he, she, it 或是人名、單數(shù)名詞等；如果將這述的句子中的主詞改為以 he, she, it 開頭，會有什麼變化呢？He plays baseball at Yi-chang Junior High School.
She wants a basketball.
Tom speaks English.
The student likes the ship.你可以輕易地發(fā)現(xiàn)到，隨著主詞改為第三人稱單數(shù)，動詞部份亦有了變化。這種現(xiàn)象在其他的動詞上亦是如此。比較看看底下的對照句：I sleep in that room.
He sleeps in that room.You love cats.
She loves cats.We watch TV every day.　（every day: 每天）
Tom watches TV every day.The students study English every day.　(注意是復數(shù)的 the students)
The student studies English every day.　(注意是單數(shù)的 the student)謝啦不客氣