Question

we commemorate gandhi jayanti with speech of his life change the voice​

Answer 1

Gandhi jayanti is commemorated with speech of his life (by us).

Explanation:

Some important points:-

1. The tense is never changed while changing into passive voice or vice versa.

2. The doer of the sentence is often omitted when it is not important. For eg. here i have omitted the doer (we) because it is not important.