Change these sentences from active into the passive voice: we pronounce this consonant with aspiration. we form the present perfect tense with the help of the auxiliary verb "to have". she promised me a book. she baked her cake very well. one uses chalk for writing on the blackboard. i shall finish my work about seven o clock.

This consonant is pronounced with aspiration.
The Present Perfect Tense is formed with the help of the auxiliary verb "to have".
A book was promised me by her. I was promised the book.
Her cake was baked very well.
Chalk is used for writing on the blackboard.
My work will be finished (by me) at about seven o clock.

1.This consonant is pronounced with aspiration.
2.The Present Perfect Tense is formed with the help of the auxiliary verb "to have".
3. I was promised the book.
4. Her cake was baked very well.
5. Chalk is used for writing on the blackboard.
6. My work will be finished at about seven o'clock.