Recently we have been learning tense sequence with using after, before and so on. One of them - until turned out troublesome for me.
My first exercise was to write this sentence with until: not to agreed to take Kevin + they see how well we get on.
Logic says to me that not to let was the first action and seeing was the second action.
They hadn't agreed to take Kevin until they saw how well we get on.
My teacher told me English sometimes wasn't mathematical and logical and this sentence should sound like that:
They didn't agree to take Kevin until they had seen how well we get on.
I said to myself: " Ok. After until it should be past perfect (simple or continuous)"
The second exercise: She didn't watch television. They bagan to broadcast signed TV programmes. (use until)
I wrote this sentence accoring to my rule After until we use past perfect!
She didn't watch television until they had begun to broadcast signed TV programmes.
According to my teacher this was wrong and this sounds better:
She hadn't watched television until they began to broadcast signed TV programmes.
It is the first time I have been shocked so much by English. Who knows and has time to explain?