Let, Make, Have and Get

This construction usually means “to convince someone to do something” or “to trick someone into doing something“.

For examples:

•  I will get my car maintained before this winter.
• How can teachers get their students to read more?
• Al-Aqsa TV commercials are trying to get people to stop smoking.

This construction means “to authorize someone to do something“.

For examples:

• The doctor had his nurse take the patient’s temperature.
• Please have your secretary forward me the e-mail.
• I had the technician check the photocopy machine.

Sometimes “get someone to do something” is interchangeable with “have someone do something“, but these expressions are not semantically the same thing.

For convenience consider the examples below:

• He got the mechanic to check his brakes. (At first the mechanic didn’t think it was necessary, but he convinced him to check the brakes.)
• I had the mechanic check my brakes. (I asked the mechanic to check the brakes.)