Поставьте глаголы, данные в скобках, во времена групп Perfect или Perfect Continuous. Перепишите и переведите предложения на русский язык.

1. Tom (smoke) ten cigarettes today.
2. Ron (study) very much this term.
3. It (snow) for two hours.
4. He (play) chess since he was eight.

has smoked

has studied

has been snowing

has been playing