We were friends 10 years ago.
We weren't friends 10 years ago.
I was in China last week.
I wasn't in China last week,
Ken was cool last year.
Ken wasn't cool last year.
You were free yesterday.
You weren't free yesterday.
It was windy last night.
It wasn't windy last night.
It was sunny this morning.
It wasn't sunny this morning.
We were singers 30 years ago.
We weren't singers 30 years ago.
You were sleepy yesterday.
You weren't sleepy yesterday.
It was snowy last week.
It wasn't snowy last week.
He was 12 years old last year.
He wasn't 12 years old last year.
They were nice friends 20 years ago.
They weren't nice friends 20 years ago.
I was in Japan last week.
I wasn't in Japan last week.
I was happy yesterday.
I wasn't happy yesterday.
Ken and Taro were at school last night.
Ken and Taro weren't at school last night.
She was a teacher 20 years ago.
She wasn't a teacher 20 years ago.
They were in Korea last month.
They weren't in Korea last month.
He was in the baseball club last year.
He wasn't in the baseball club last year.
She was busy last night.
She wasn't busy last night.