英语中is和are过去式的写法和运用

Question

嗯·这是今天晚上的作业·由于几天上课没听，忘了是什么意思了~麻烦各位帮帮忙~我还有三十分钟就要睡觉了~及20：30分嗯，这是老师布置的作业，会的也帮帮忙做把~··········中译英，饭后改为过去式（用反义词）1.这信封现在是湿的2.我的鞋现在是干净的3.他的房间现在是整洁的4.天气是暖和的各位拜托了哦

Answer 1

is 过去式是 was, are 的过去式是were.1,This letter is wet now. This letter was dry .2,My shoes are clean now. My shoes were dirty. 3. His room is clean and tidy now. His roon was mass .4,The weather is warm . The weather was so cold.