I had lunch at half past twelve 是不是主系表结构?

I had lunch at half past twelve 是不是主系表结构? We're having lunch I'VE already had lunch I had lunch at half past twelve变成否定句和一般疑问句.还有I'VE just had a cup, thank you. We can have our coffee there. We're going to leave tomorrow. Tom and I are going to have a holiday.I' I had lunch at school yesterday改为一般疑问句 I have had lunch at school.对at school提问可不可以填where have you had lunch? After i had had lunch at a village pub,这里的两个had是什么用法 对打了括号部分的提问：the boy had (some medidine) just now.i like the coat (on the right) best.she usually gets up (at half past six).she went shopping (by bus) yesterday.we have lunch (at school). l have lunch at half past eleven. l have lunch at half past eleven. I have had lunch at home 改否定句I _____ _____ at home. Have you had ( )Lunch?--yes,i had( )good dinner at my friend's house,too Afer I had had lunch at a village pub.什么语法 After I had had lunch at a village pub.用的是什么语法 I have had lunch at school.对at school提问特殊疑问句 英语语法：After I had had lunch at a village pub,I l英语语法：After I had had lunch at a village pub,I looked for my bag.句中为什么要用两个had? after I had had lunch at a village pub为什么有两个had?请详细解释,谢谢! Last year i went to America.I stayed there f____ half year .I found most Americans had three meals a day.thay had b____ in the morning ,a light lunch at noon ,and a big time for dinner .Americans usually duink a lot of w____ ,a lot of milk ,and a lot His father had lunch at home yesterday,so did_(I)填写?为什么? 如果一个英国人告诉我I have had lunch at school,我可不可以这么问：where did you have lunch?说错了，英国人说是I have had lunch 我问的是where did you have lunch？