What is the difference in meaning between the following sentences?
I have known her since I lived in the street.
I have known her since I have lived in the street.
In Swan's 4th edition of English Usage it is said that "since" can be used as a conjunction of time, introducing its own clause.The tense in the since-clause can be perfect or past, depending on the meaning.
I cannot see any difference in the sentence above. I cannot see the difference between the following sentences either.
We visit my parents every week since we bought the car.
We visit my parents every week since we’ve had the car.