Let's___________(be) good friend

Let's___________(be) good friend let,s are good friend还是let,s be good friend let's be good friend 为什么用be let us be good friend 哪里错了 Let's ______(be) good friend.这怎么做? Let's be good friend .指出错误单词 Let's be good friend.哪个单词错了? -Let's be friend,___________? Let's be good frieds,---? let us be good friends. 今天看到某牌子衣服有这样一句话："Let‘s be a good friend",这句话有意义么,像是病句 想下载Let's just be friend