为什么用had?had呢，这里是一般现在时的虚拟语气哦?
He??has?no?right?to?choose?.has说明是一般现在时
从句的谓语动词的时态要往后推一个时态,
1．一般现在时虚拟语气
从句：过去式（be只用were）?
主句：would(should/?could?/?might)+动词原形
If?it?were?not?raining,we?should?go?for?a?picnic.
2．一般过去时虚拟语态
从句：had?+done?
主句：would(should/?could?/?might)+have?+?p.p.
She?should?have?gone?to?the?party?if?she?had?been?invited.
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