Open the brackets using correct verb form in perfect continuous tenses 1. john is in his room, he(to sit) there since the morning. 2. for two hours now we (to talk) about it and we haven`t come to any conclusion yet. 3. by may my grandfather (to work) at the factory for 20 years. 4. i (to try) to get him on the phone all day. 5. i (to write) the letter for an hour when mother called me. 6. he (to work) on his book for a year soon.

1. John is in his room, he (has been sitting) there since the morning.
2. For two hours now we (have been talking) about it and we haven`t come to any conclusion yet.
3. By May my grandfather (has been working) at the factory for 20 years.
4. I (have been trying) to get him on the phone all day.
5. I (have been writing) the letter for an hour when mother called me.
6. He (has been working) on his book for a year soon.