这句话如果翻译？谢谢！~

1 如果真的是这样的话，我可以把我的租房合同改为从8月1日开始的那份吗？

If really so, can I change my rented house contract for the one start from 1, August?

上面的人请注意

change for 是“交换”

change into 是“兑换，翻译”

2 我会非常感谢如果你能帮忙的话
I will be grateful if you can help me

If so, shall I change the rent contract into the one which stars on 1 Augst?

If so, can I sign that contract which start my house lent from AUG.1st

If it is really so,can I amend my rent contract which started from Aug.01?

If this is true, can i change my rental contract from August 1 ?

If so,could I change my rent pact to that one which starting from 1st Aug