THE PRESENT PERFECT TENSE 213 from 3. hasn't, Tib, yet, the books, to the library, returned. k. ds, a 4. in the garden, already, the grass, my grandfather, cut, has. 5. have, this year, the students, French, studied. 6. this summer, we, in the sun, lain, haven't. 7. never, a bicycle, has, his little sister, rid- den. 8. been, have, to the museum, we, today. 9. has, this morning, cleaned, Jane, the windows.

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