I have not an iPhone.
I do not have an iPhone.
Lee seen the snakes.
Lee saw the snakes.
If the world ended tomorrow, I will be very sad.
If the world ended tomorrow, I would be very sad.
If I am a child, I would play outside.
If I were a child, I would play outside.
I still did my homework at 10:30 PM last night.
I was still doing my homework at 10:30 PM last night.
I seen you last night.
I saw you last night.
I was listening to music when he open the door.
I was listening to music when he opened the door.
She send me roses yesterday.
She sent me roses yesterday.
I have not ate anything today.
I have not eaten anything today.
I falled asleep while I watched TV.
I fell asleep while I was watching TV.
If we will be late, they will be angry.
If we are late, they will be angry.
My friend sometimes go to the gym.
My friend sometimes goes to the gym.
I haven't ever been to Mexico.
I haven't been to Mexico / I have never been to Mexico.
It is raining when I got home last night.
It was raining when I got home last night.
Look! He is run.
Look! He is running.
The students have a good time in class today.
The students are having a good time in class today.
How much apples do you need?
How many apples do you need?
Everyone have seen that movie.
Everyone has seen that movie.
I lived in Canada since I was 10 years old.
I have lived in Canada since I was 10 years old.
Why you did call me when I was at work?
Why did you call me when I was at work?