The students have a good time in class today.
The students are having a good time in class today.
Look! It is snow.
Look! It is snowing.
It is raining when I got home last night.
It was raining when I got home last night.
Did your siblings visited you last night?
Did your siblings visit you last night?
I fell asleep while I watched TV.
I fell asleep while I was watching TV.
If I am a child, I would play outside.
If I were a child, I would play outside.
Lee afraid of snakes.
Lee is afraid of snakes.
How much apples do you need?
How many apples do you need?
I still did my homework at 10.30 pm last night.
I was still doing my homework at 10.30 pm last night.
My friend sometimes go to the gym.
My friend sometimes goes to the gym.
My father is thinking that I should stop smoking.
My father thinks that I should stop smoking.
Everyone have seen that movie.
Everyone has seen that movie.
I haven't ever been to Korea.
I haven't been to Korea / I have never been to Korea.
I was listening to music while he opened the door.
I was listening to music when he opened the door.
She send me roses yesterday.
She sent me roses yesterday.
Why you did call me when I was at work?
Why did you call me when I was at work?
If we will be late, they will be angry.
If we are late, they will be angry.
I have not an iPhone.
I do not have an iPhone.
I have lived in Canada since 10 months.
I have lived in Canada for 10 months.
If the world ended tomorrow, I will be very sad.
If the world ended tomorrow, I would be very sad.
I have not ate anything today.
I have not eaten anything today.