4. We (be) __________ at primary school from 1993 to 1998. We (be) __________ in this class since September.

4. We (be) __________ at primary school from 1993 to 1998. We (be) __________ in this class since September.

В первом предложении необходимо использовать Past Simple, так как действие произошло в прошлом и закончилось. Во втором предложении необходимо использовать Present Perfect, так как действие началось в прошлом и продолжается до настоящего момента.

1. We were at primary school from 1993 to 1998.
2. We have been in this class since September.

Ответ:

1. We were at primary school from 1993 to 1998.
2. We have been in this class since September.