"Should I buy this video?" - Paul asked her

• Paul asked her if he should buy this video.

• Paul asked her if he should bought this video.

• Paul asked her if he should buy that video.

"Call me before you leave" - Peter asked Martin

• Peter asked Martin to call you before he left.

• Peter asked Martin to call him before he left.

• Peter asked Marin to call him before he leaved.

"Unfortunately, my computer doesn't work" - Ann complained

• Ann complained that unfortunatey her computer didn't work.

• Ann complained her computer didn't work.

• Ann complained her computer doesn't work.

"I'll do my best in the exam tomorrow" - Mark promised.

• Mark promised to do his best in the exam the next day.

• Mark promised doing his best in the exam the next day.

• Mark promised to do his best in the exam tomorrow.

"Do you want to study Spanish?" - Mark asked Peter

• Mark asked Peter if he wanted to study Spanish.

• Mark asked Peter did he want to study Spanish?

• Mark asked Peter if he wants to study Spanish.

"How long have you been working on this project?" - The teacher asked us

• The teacher asked us how long we had been working on that project?

• The teacher asked us how long had we been working on that project.

• The teacher asked us how long we had been working on that project.

Don't play on the grass, boys! - She warned

• She warned the boys not to play on the grass.

• She warned the boys to not play on the grass.

• She warned the boys to don't play on the grass.

"Does Peter know Robert?" - Mark wanted to know.

• Mark wanted to know if Peter knew Robert?

• Mark wanted to know if Peter knew Robert.

• Mark wanted to know if Peter knows Robert.

"Will you join me in a cup of tea?" - Jeff invited me.

• Jeff invited me wiil you join him in a cup of tea.

• Jeff invited me if I would join in a cup of tea.

• Jeff invited me to join him in a cup of tea.

"Where have you been today?" - The teacher asked us.

• The teacher asked us where we had been that day.

• The teacher asked us where had we been that day.

• The teacher asked us where have we been today.