I / not see / my friend / since last summer
I haven’t / have not seen my friend since last summer.
She / not eat / sushi / before
She hasn’t / has not eaten sushi before.
They / work / at the company / since 2010
They have worked at the company since 2010.
We / know / each other / since childhood
We have known each other since childhood.
He / study / English / for a long time
He has studied English for a long time.
I / have / this phone / since last year
I have had this phone since last year.
Tom / play / football / since he was a child
Tom has played football since he was a child.
We / be / friends / since primary school
We have been friends since primary school.
