The birds were sing yesterday.哪里错,怎么改?

The birds were sing yesterday.哪里错,怎么改? the children enjoy the birds [ ] [sing] The birds sing改现在进行时 We are enjoying the birds( ).(sing) We are enjoying the birds .(sing) Look,the birds ______(sing) in the tree. 适当形式填空 Listen,the birds in the tree (sing) Listen,the birds ________________ (sing) in the tree Can you hear the birds sing in the morning?Can the birds _____ _____ ______ sing in the morning? 英译中 The birds were singing yesterday There were some birds _______ the forest. I hear the birds sing.变为被动句 Have you ever wondered why birds sing?Maybe you thought that they were just happy．After all,you probably sing or whistle when you are happy． Some scientists believe that birds do sing some of the time just because they are happy．However,they si ____ are the birds doing?The birds are sing in the tree.选Where还是What 为什么?____ are the birds doing?The birds are sing in the tree.选Where还是What 为什么? The day broke for the birds were singing.分析句子成分 there are many birds in the forest .birds withthere are many birds in the forest .birds with red and green feathers sing in the trees .Birds with yellow and purple feathers come from the plains.的中文意思 . There were some birds in the tree.改成一般疑问句 The men with guns were hunting birds.如何翻译?