we had better leave now.(改为否定句)怎么改?

we had better leave now.(改为否定句)怎么改? We had better leave it unsaid.怎么会是被动的?We had better leave it unsaid.be 动词也没有看到,为什么后面是过去分词unsaid呢? 选择题：Since she is angry, we . A. had better to leave her alone B. should leave her along C. might We had better leave ,hadn't we 这句话有错误吗?还是haven't me 还有werent we had better的用法我遇到一个题目是这样的：-we had better leave soon-yes,we_____．答案是better had.为什么答案不是had或者had better? since it is already midnight,we had better leave now 这是什么时态?为什么用had?固定搭配? I had better _______ now.(leave leaving) We had better leave things ___they are until the police arrive.A.as B.like C.that D.what We had better leave things ___they are until the police arrive.A.as B.like C.that D.what It's better ____for another five minutes.A.wait B.waiting C .to waiting D .to wait问句：Had we better leave right away?到底怎么回事？ you leave now.A had better B had better nyou leave now.A had better B had better not C have Since she is angry,we _.A.had better leaving her alone B.should leave her alone C.might as well leave her alone D.had rather leave her alone.请给出解题详情. Since she is angry,we ______.a.had better leaving her alone b.should leave her alonec.might as well leave her alone d.had rather leave her alone you had better leave it to a professional的意思 Since she is very angry now,we ______.A：had better leaving her alone B：could leave her alone C：need to leave her alone D：might as well leave her alone ( B )23.We had better ______ things as they _______.A.leave / were B.leave / are 为什么不是A?不是吧,意思应该是：我们最好让他们保持原样.我这么理解的.就是不明白后头用什么时态. You ___ your key to your mother before you leave .You _________ your key to your mother before you leave .A.had better to give B.had to give better C.had better give D.had better given Can I leave this door open at night?A.should better notB.would better notC.had better notD.had not better请问选择什么 为什么?