Expressing ability

Expressing ability
I can get the job done myself.
We can definitely finish the project by tomorrow.
I have the ability to stay focused for long periods of time.
He’s fluent in Spanish and Italian.
She’s a qualified and experienced piano teacher.
I can type about 100 words per minute.
I can probably fix your computer.

e.g
Hi Dorothy,
I just got the message that your car not starting. Have you called a mechanic yet? I’ll be off work tomorrow morning, so I could drop by your place and have a look at it. If it’s a minor problem, I might be able to fix it for you. Call me and let me know.
Kind regards,
Daniel

Dear Mr. Davis,
I understand that you have been looking for someone to compile and edit our office’s monthly newsletter. If the position hasn’t yet been filled, I would like to offer to serve as editor. I’m aware of the time commitment involved, but I’m confident that I can handle it and do a good job.
Sincerely,
Daniel