1.My father often watches tv after dinner.meal指具体的一顿饭 dinner就泛指晚餐
2.We can eat much food in our life.during +时间名词
3.i'm not afraid of dogs any more.not ……any more =no more
4.Nobody knows the answer to the question 【nobody】是单数
5.isn't he a farmer?no,he isn't.he's a worker.反义疑问句,按实际情况回答.是就yes不是就no