Обусловьте время глагола и укажите его инфинитив.1. They were investing money

Обусловьте время глагола и укажите его инфинитив.
1. They were investing money in this business for two years.
2. Their company takes long-term loans from the bank.
3. They studied carefully income statement and balance sheet.
4. We shall have a lot of work at the end of the fiscal year.
5. The report was prepared carefully and on lime.