Many students online email me with their "doubts" about English grammar or pronunciation. When you have a doubt, you are unsure about something, or you don’t believe that something is true:
Jennifer has her doubts about her daughter’s decision to get married.
The teacher has some doubts about the new textbook she’s using.
This is, without a doubt, the best pie you have ever made.
There’s no doubt about it–this company is going to have a large profit this year.
The word "doubt" is often used as a verb:
Tom doubts his ability to fix his own car; that’s why he takes it to a mechanic.
The tellers at the bank doubted the identity of a customer, so they asked him for some I.D.
I’ll never doubt you again!
I’m sorry I doubted you.
Tom never doubts his mechanic is telling him the truth about his car.