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4. ___ they ______ the letter? (to read )5. I ___ not ______ the words. (to forget)6. We ______ to come even before we received the letter. (to decide)7. ___ he not ______ everything well? (to organize)8. They ___ not _____ a holiday in a long time. (to have)9. She ________ to talk to us. (to stop)10. He ___ not yet ______. (to arrive)11. ___ you _____ to meet him? (to plan)12. I __ not ______ her for a long time. (to see)Answers7. Using the Past Perfect Continuous tense, fill in the blanks with the correct forms ofthe verbs shown in brackets. For example:We ________ for an apartment. (to search)We had been searching for an apartment.She _______ extra courses. (to take)She had been taki ng extra courses.1. We __________ the grass. (to cut)2. You ___________ at the photographs. (to look)3. They __________ you the letters. (to give)4. He __________ for us. (to wait)5. She __________ a business. (to run)6. It __________ all night. (to rai n)7. We __________ them. (to encourage)8. You _________ on the beach. (to lie)9. They __________ the sauce. (to taste)10. He __________ behind. (to lag)Answers8. Rewrite the following affirmative statements as questions, negative statements,negative questions without contractions, negative questions with contractions, andaffirmative statements followed by negative tag questions. For example:She had been keeping a diary.Had she been keeping a diary?S he had not been keepi ng a di ary.Had she not been keeping a diary?Hadn"t she been keeping a diary?She had been keeping a diary, hadn"t she?1. We had been raking the leaves.2. You had been visiting your cousins.3. They had been swimming in the lake.Answers9. Using the Past Perfect Continuous tense, fill in the blanks with the correct forms ofthe verbs shown in brackets. For example:We _______. (to argue)We had been arguing.