Перепишите следующие предложения. Подчеркните в каждом из них глагол-сказуемое и определите его видовременную форму и залог. Переведите предложения на русский язык. В разделе (б) обратите внимание на перевод пассивных конструкций.
а) 1. Someone is knocking at the door. Are you going to answer it?
2. I haven’t seen him since our childhood.
б) 1. The plot of land was bought from private owners by the state.
2. The intensity of this process is influenced by many factors.

is knocking - present continuous

are going - present continuous

haven't seen - present perfect

was bought - past simple passive

is influenced - present simple passive