Can you notice the difference if for example you are signing a contract which may contain one of the following two statements?
1. You will have to pay a one-off subscription fee
2. You will have to pay a once-off subscription fee
Have you ever noticed that people use the phrase "have had" wrongly!
1. You will have to pay a one-off subscription fee
2. You will have to pay a once-off subscription fee
Have you ever noticed that people use the phrase "have had" wrongly!