She will be praised very much by you.

Why is a lie told by you?

Here, the doer or the subject is not mentioned. So we need to add a subject that is generally used in these cases.

Given sentence is in past tense passive form.

Its rule is

Obj + Was/were + verb 3rd + subject.

Here, infinite (to go) and obliged are used. He is an object for the passive form. The subject is omitted. Generally, the circumstance is used as a subject in these cases.

Hence the active voice of a given sentence is

Circumstances obliged him to go.

He has been granted a scholarship by the Principal.

By whom were you given permission to enter ?

Have all the necessary arrangements been made by someone?

A movie is going to be watched by my friends tonight

was being interviewed

After being driven to the museum, Professor Kumar was dropped at his hotel.

The main skills sought to be developed by us include analysing, interpreting and evaluating ideas

Has your question been answered by anyone from our team

He should not be laughed at by us.

Weren’t you told to be here by six O’clock?

is being shown

Stones on others should not be thrown by those who live in glass houses

This mischief could not have been done by a child.

An advisory board drafted the agreement between the management and the workers.

Subject + V₂ + Object. (Active)

The work will have been completed by the time we get there.

The new drug has not been approved for sale by the government.

Given sentence is a negative sentence of Present Perfect Tense and in active Voice.

Rule :
Subject + (has /have) + not + been + V³ + Other agents.

The lecture probably won’t be attended by them.

The sentence was delivered by the judge at the courtroom yesterday.

A massive tribal welfare programme has been launched by the government in Jharkhand.
The given sentence is in active voice and it is in Present Perfect Tense.
Rule :
Subject + (has /have) + been + V³ + Other agents.

A perfect dam has been built by the beavers across the stream.

He has been granted a scholarship by the Principal.
The given sentence is in active voice and it is in Present Perfect Tense.
Rule :
Subject + (has /have) + been + V³ + Other agents

Grass is not eaten by a lion, however hungry he may be.

The flower has not been plucked by him

Good marks were seldom obtained by those who worked hard.

The patient was advised by the doctor not to eat rice.

Be prepared for the worst.