Поставьте глаголы, данные в скобках, во времена групп Perfect или Perfect Continuous.
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.

1. Tom (has smoked) ten cigarettes today. 2. Ron (has been studying) very much this term. 3. It (has been snowing) for two hours. 4. He (has played) chess since he was eight.