last month / a month ago

[tranlam1609]

I last met him last month.

I rewrite the above sentence as followings
1. I haven't met him since last month./ I haven't met him for a month.
2. The last time I met him was last month./ The last time I met him was a month ago.
3. It's a month since I last met him.
Can you show me if I have any mistakes?

 

[tedmc]

I last met him last month.

I rewrite the above sentence as follow[STRIKE]ing[/STRIKE]s:
1. I haven't met him since last month./ I haven't met him for a month.
2. The last time I met him was last month./ The last time I met him was a month ago.
3. It's a month since I last met him.
Can you show me if I have any mistakes?

The sentences look fine to me.

 

[Matthew Wai]

3. It's a month since I last met him.

I think 'It has been a month...' is also correct, but I am not a teacher.