An amateur wizard is proudly bragging about his magical skills at a party, but his grammar isn't always as perfect as his spells! Select ALL the statements that are grammatically correct. Choose all that apply.
The correct answers are: I started learning spells five years ago. I have practiced the invisibility spell for six months. I have been a certified wizard since last December.
Five years ago correctly uses ago with the simple past tense (started).
For six months correctly uses for to show a duration of time.
Since last December correctly uses since to indicate a specific starting point.
"Since five years" is incorrect because "five years" is a duration (it should be for five years). "For two weeks ago" incorrectly mixes two different time expressions.