определите в каждом из них видо-временную форму глаголов и укажите их инфинитив. Переведите предложения на русский язык
1. When the news is over, we shall have delicious supper.
2. When it is time for sturgeon to spawn it leaves the sea for the rivers.
3. Not many scientists understood Einstein’s discovery at that time.
4. Your friend doesn’t like to learn English grammar.