David ...... (walk) when he was two years old.

None of my friends ...... (speak) Spanish when they went to Spain for the first time in 1998.

I ...... (not / look) at the poor pup suffering, so I shoot it dead.

Mr Richardson ...... (not / bear) the sight of those young men smoking cigarettes all the time so he reported them to the principal.

I'm afraid my sister ...... (not / come) to the meeting yesterday. She had a serious family emergency.

Frank ...... (not / move) his legs for two whole weeks after the car accident.

My brother and I ...... (play) tennis really well when we were children.

Mrs Kingsley ...... (type) extremely fast when she joined our team.

The brain surgeon ...... (operate) on patients day and night. He was a high skilled doctor.

Master Brown ...... (not / come) to school yesterday as he went down with the flu.

...... (you / ride) a motorbike when you were a teenager?

...... (she / play) the piano before she could read?