have遇到第三人称单数是怎样变化的?

问题描述:

have遇到第三人称单数是怎样变化的?

he/she/it has
he/she/it had
he/she/it has been
he/she/it had been

请把下列各题的主语改为第三人称单数,并作其他必要的表达变化。 1.I (be, begin, belong, cook, cry, do, feel, go, have, help, keep

分时态,一般时has,过去时had,将来时will have,完成时have had