it is raining now 怎么变过去时 it is raining now 这句变过去式 变成了：it rained yesterday.请问 为什么后面那句不加BE动词的过去式形态 were/was?不甚感激!i am back 的过去式是什么？am back 不都是动词吗

It is raining now.It_____yesterday. It's raining now.Today is（） It is raining unusually hard right now it is raining now.变为一般疑问句 It is raining now 同义句 It is raining hard now.改错 It is raining hard now .(用tomorrow改写句子)It ---- ---- ---- ---- There is ( ) rain.It is raining ( ) now.啷个填? it is raining cats and dogs outside now! 英语翻译it is not raining that hard now. 英语连词成句：heavily,is,raining,it,now! It is raining hard now (用tomorrow改写句子) it is raining BLANK 怎么翻译? It is raining now.raining 词性是什么下雨应该是动词吧 英语翻译now all it has to do is stop raining.是不是all (it has to do ) is (stop raining)? It is very hot here now ,but it sometimes______.A.rain B.raining C.is raining D.rains Look at the ___ It is ___ hard now.A.rian,rian B.raining,raining C.rain,raining D.raining,rainy it is raining是什么意思?