I was having dinner at a restaurant when Tony Steele came in.这个句子中came 为什么不加s

I was having dinner at a restaurant .having dinner 前为什么 有was ,having dinner 不也是一个动词短语,能当谓语吗 I was having dinner at a restaurant请问这里的at 改换成in行吗? The whole family ____(be)having dinner when i was visiting them. it so happened that i met her while i was having dinner at the restaurant=i happened. 逗号的用法:While I was having dinner,my brother was packing.While I was having dinner,my brother was packing.是否可以：While I was having dinner my brother was packing.如 toddzhang123 老师的提议，这句话可以不使用逗号，而 可以这样改句子吗1 While I was cooking the dinner,he was having a wash.2 While I was cooking the dinner,he was watching television.3 While I was cooking the dinner,he was cleaning his shoes.4 While I was cooking the dinner,he was listening to I was having dinner at a restaurant when Tony Steele came in.这个句子中came 为什么不加s 求教I was having dinner in a restaurant when he came in请问这句话有错误的地方吗? 帮帮忙_看看这句话是什么时态I was having dinner with some friends between 8 and 10 yesterday evening. uncle told me that he was having dinner when i called him the night before.改为直接引语 I had dinner 和 I was having dinner 的区别这道题是这样的---I called you yesterday evening,but there was no answer.---Oh,I am sorry I _____ dinner at my friend's home.A.have B.had C.was having D.have had为什么选c 为什么不选B While mike was having dinner.I__the suitcase.(pack) I was having dinner at a restaurant.I see Tony Steele after a while .这里的see为什么是原形?新概念U11摘要写作. When someone knocked at the door,I was having dinner.可不可以把when放在I的前面呀?这样意思也一样? when i come in,the family___ having dinner I have had dinner with mu friends in the resturant when the crime happened.A.have B.had C.was having D.have had选哪个?为什么? i ( ) dinner with my friends in the restaurant when the crime happened.have,had,was having,have had,选什么?为什么?这是什么句型? The Thomas _is having/are having/were having/was having__ dinner when l phoned them last night.