:in each of the following sentences, there are two verbs in brackets. put one in the past simple and one in the past perfect when schoolchildren (finish) their lessons, they (go) home. my father took me to almaty last year. he (be) there as a student, so he ) his way around. when i got to school, i (understand) that (forget) my english texbook. !
2. had been ; knew
3. understood ; had forgotten