is this correct?

[Anonymous]

Is the following sentences are correct

1.Fault is yours yet you punished me.
2.Though I too know how to copy and paste , I have never used that when I write to you.
3.Knowingly or unknowingly, if I have ever hurt your feelings, I am sorry./I am sorry for everything I have done to you.

Thanks a million

[Pete]

<strike>Is</strike> Are the following sentences <strike>are</strike> correct?

1. The fault is yours, yet you punished me.
2.Though I too know how to copy and paste, I have never used [or: done] that when I <strike>write</strike> wrote to you.
3.Knowingly or unknowingly, if I have ever hurt your feelings, I am sorry./I am sorry for everything I have done to you.
-- I'd rearrange the words:
- If I have ever knowingly or unknowingly hurt your feelings, I am sorry.
-- The second sentence is fine by itself.