I'm writing an apology letter for missed class. Which of the following should I use?
- I had not being able to attend the class.
- I not having been able to attend the class.
If both are ungrammatical, is there any other way to express this?
When I searched for answers, I got more confused. I couldn't find any legitimate solution, and I'm not sure if the sources can be trusted or not. Can anyone help me on this?