I can't attend this institute for two months, because I worked very hardly at that time.

Hi all, I'm learning English now.
Please check the below sentences.


I didn't attend this institute for two months, because I worked very hardly at that time.


Thanks,

Any of these soulitons will work.

Due to the fact that I was working hard, I was not able to attend this institute for two months.

I was not able to attend this institute for two months now, because I was working very hard during that time.

I did not attend this institute for two months now, because I was busy work hard during that time.

I was working very hard for the duration of two months, so I was not able to attend this institute.