By whom were you taught grammar ? ( Passive )
The sentence is in Simple Past Tense . ( Active )
who in Active form becomes by whom in the Passive .
You are said to have done that. ( Passive )
The sentence is in Simple Present Tense . ( Active ).
It is also a Complex sentence. In changing the Voice of Complex Sentences the Voice of both the Principal and Subordinate clauses should be changed.
Let me not be laughed at, ( Passive )
The sentence is in Simple Present Tense. ( Active )
In Active Voice, if the sentence expresses command or order or request ( Imperative mood ), then, in Passive Voice the word let is placed at the beginning of the sentence.
e.g. Do it. ( Active ). Let it be done. ( Passive )
He was seen picking up a gun by someone. ( Passive )
The sentence is in Simple Past Tense. ( Active )
The bull was pulled violently. ( Passive )
The sentence is in Simple Past Tense. ( Active )
It is time for tea to be taken. ( Passive ) The sentence is in Simple Present Tense. ( Active )
Passive of Infinitives is done by retaining to followed by be and the Past Participle of the Verb.
eg. It is time to tell him the truth. ( Active )
It is time for the truth to be told to him. ( Passive )
The sentence is in Simple Present Tense. ( Active )
Were you frightened by the noise ? ( Passive )
The sentence is in Simple Past Tense . ( Active )
An Interrogative Sentence beginning with Auxiliary Verb-Did will be converted to a Passive one by first changing it into Assertive, then Passive and finally an Interrogative one.
Sentence ⟶ Did the noise frighten you ? ( Active )
The end of this exercise is being reached by us. ( Passive )
The sentence is in Present Continuous Tense. ( Active )
He likes to be called sir by people. ( Passive )
The sentence is in Simple Present Tense. ( Active ).
It also has Double Objects (he, sir)
Passive of Infinitives is done by retaining to followed by be and the Past Participle form of the Verb.
Someone has cut the telegraph wires. ( Active )
The sentence is in Simple Present Tense. ( Passive )