1. I attend sports club twice a week.
Do you attend sports club twice a week?
Do you attend sports club once or twice a week?
You attend sports club twice a week don't you?
How often do you attend sports club?
2. My sister has just come back home from school.
Has your sister just come back home from school?
Has your sister just come back home from school or from sports club?
Your sister has just come back home from school, hasn't she?
Where has your sister just come back home from ?
3. She is writing a letter right now.
Is she writing a letter right now?
Is she writing a letter or a composition right now?
She is writing a letter right now, isn't she?
What is she writing right now?
4. Yesterday we saw a big snake in the forest.
Did you see a big snake in the forest yesterday ?
Did you see a big snake or a tiger in the forest yesterday ?
You saw a big snake in the forest, didn't you?
When did you see a big snake in the forest ?