It is time to take tea.

It is time to take tea.

Explanation

Active Voice: It is time to take tea.

Passive Voice: It is time for tea to be taken.

Third form of verb is always used in passive voice sentence.

Take tea means چائے پینا

It is time to take tea means چائے پینے کا وقت آچکا ہے

Take is a verb 

Took is the second form and taken is the third form of Tea.