Supply the necessary forms for the verbs given in brackets
1. Her lips were parted as if she (to be) out of breath. 2. Hugh laughed awkwardly, as if he (to say) something indecent. 3. Then he rolled his eyes in his head, as if he (to do) an exercise. 4. He looked down at his feet as though he (to be) unconscious of the company. 5. Her face was red and swollen as though she (to choke). 6. She was breathing fast and deep, as though she (to run). 7. He leaned back as if he (not to have) a care. 8. Her eyes were sparkling as though she (to laugh) at us. 9. She spoke of this and that as though she (to make) conversation with a stranger. 10. Jones greeted me as though I (to be) an old school-friend whom he had not seen for years. 11. He went into the house by the back door and sneaked up the stairs as though he (to have) something to hide.

Можно объяснение?

As if используется для выражения "как-будто бы,будто" . Глаголы после as if употребляются в подходящем по смыслу времени. Present/past simple,но не perfect

1 was2 told3 was doing4 was5 choked6 was running7 didn't have8 was laughing9 was making10 was11 had