Use Present Perfect Continuous: 1. We (to build) his house since 1994. 2. Where are you? I (to wait for) you for an hour already. 3. He (to work) hard since four o’clock. 4. Kate (to wash) the floor for twenty minutes already. 5. How long you (to learn) the French language? 6. The children (to play) football since three o’clock but they are not tired. 7. I (not to eat) at night for two years. 8. Can you see my glasses? I (to look) for them for ten minutes but I have not found them yet.

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