Replace the Infinitives in brackets by the necess- ary tense-forms: 1. I didn't buy new furniture for my study last week, but I (to buy) it next week. 2. We had no modern conveniences in our old house but we (to have) them in the new one. 3. Tom didn't invite us for his birthday last week but he (to invite) us for his house-warming next week. 4. My sister didn't clean her room yesterday but she (to clean) it tomorrow. 5. They didn't repair our washing machine last Monday but they (to repair) it next Monday. 6. My friends didn't move to the new flat but they (to move) to it next month.