it接have还是has'perhaps it has begun already.' 'it may have begun already'第二句为什么用的是have?

it接have还是has'perhaps it has begun already.' 'it may have begun already'第二句为什么用的是have? 是It have three...还是是It has three...请问这种句型里是用have还是has? does a bird have wings 是it does 还是it has或it have Perhaps it is right that I should not have appeared Perhaps people have used it for a century It 是has还是have还是had got a panda on it almost everyone后接have还是has 不可数名词后接has还是have? it is you who have invented it.it is you who has invented it 请问这种情况是have对还是has对? I love you once , perhaps that love has yet 谁会翻译啊I loved you once,Perhaps that love has yetto die down thoroughlywithin my soul,but let it not dismay youany longer,I have no wishto cause you any sorrow,I loved you wordlesslywithout a hope,b Does it have 还是 Does it has?平日里用某样东西做提问,etcDoes it have any scratches,nicks and so on?这里用Does it have 还是 Does it has?为什么?如果回答I can tell you that it has no scratches or blemishes 这里用it has 还是 复数用has还是have Who 用has还是 have? she应该是have还是has they＋have还是has has your还是have you you用has还是have it have both good and bad aspects还是it has both good and aspects 还是it both have good and bad