This sample letter will demonstrate how a cover letter should be written

Name[receiver]

Designation
Name of the institution,
Street Address

City,State, Zip Code

Date MM/DD/YYY

Dear [Receiver],
I saw your advertisement for the post of junior foreman in your company and thus i would like to submit my application for it as i believe i am the best suited person for that job.

I have a builders certificate and i have been working in a number of commercial construction projects for the last six years. If you are interested you can check my CV which i have attached with this letter.

Thank you

Yours faithfully,
[Your name]