I was very happy last sunday.改为否定句怎么改

I was very happy today! Together with you.i was very happy. today I was very happy可以用was 吗? Thanks She was very happy I am very happy I()(feel)very happy When I was young,happiness is a very simple thing; Grew up,simple is very happy. I was happy. Although some late,but I was very happy是什么句式?这个was是不是应该换成am many gratulate my birth .i was very happy in that birthday party,and i will n yesterday ,I h什么 from my mother,I was very happy When I came back from the Great Wall ,I was very tirand happy.改错 I am feeling very happy Thanks!I'm.very.happy. I'm very not happy I f___ very happy yesterday. I went shopping last Sunday,I was/am very happy.was和is哪个正确?或者都正确? I was very happy to stay at home and raise our three children.