Present Simple
They know how to get to the airport from here.
They don't know how to get to the airport from here.
He knew every single person who came to the party last night.
He didn't know every single person who came to the party last night.
She doesn't believe what the fortune teller says.
She believes what the fortune teller says.
He didn't speak English.
He spoke English.
I understand the lesson you are teaching.
I don't understand the lesson you are teaching.
I didn't sit on that chair when you called me.
I sat on that chair when you called me.
She tries to do the best in her math exam.
She doesn't try to do the best in her math exam.
He spent $3,000 for buying a computer.
He didn't spend $3,000 for buying a computer.
The man goes to the office every morning.
The man doesn't go to the office every morning.
The pilot flew the plane very well.
The pilot didn't fly the plane very well.
This phone doesn't have internet connection.
This phone has internet connection.
The crowd cheered because the other team didn't score.
She doesn't do the homework.
She does the homework.
I didn't see you were coming to my house last night.
I saw you were coming to my house last night.
She doesn't take medicine when she is sick.
She takes medicine when she is sick.
The doctor gave me a prescription.
The doctor didn't me a prescription.
That car has three spare wheels.
That car doesn't three spare wheels.
He fought with me yesterday.
He doesn't organize the event perfectly.
He organizes the event perfectly.
She didn't forgive me if I didn't give her chocolate.
She forgave me if I gave her chocolate.