Active Voice : - In the active voice, the sentence's subject performs the action on the action's target.

Passive Voice : - In the passive voice, the target of the action is the main focus, and the verb acts upon the subject.

Conversion  of Passive Voice Sentence into Active Voice For Continuous Tense:

Present Continuous Tense:

Rule used to identify that the sentence is in Passive Form with present continuous tense is:

:subject + is/am/are + being + third form of verb + by + object.

For Example:

• The doors are being repaired by the carpenters. (passive)

The subject is 'the doors' ,object is 'the carpenters' and  'repaired'  is the third form of the verb repair. The subject 'the doors' is plural so the helping verb 'are' is used.

While converting into Active Voice the rule will be :

subject + is/am/are + first form of verb + ing + object.

In the question : -

Many words are being spelled by her wrongly.

The active form of above sentence for continuous tense :

She is spelling many words wrongly. In this sentence , object ( many words) is converted into subject ( she) , then use helping verb is , then use first form of verb spell with ing and then object( many words) .

Thus , the Correct Option is B , which is She is spelling many words wrongly. 

Active Voice : - In the active voice, the sentence's subject performs the action on the action's target.

Passive Voice : - In the passive voice, the target of the action is the main focus, and the verb acts upon the subject.

Conversion  of Passive Voice Sentence into Active Voice For Continuous Tense:

Past Continuous Tense:

Rule used to identify that the sentence is in Passive Form with past continuous tense is:

subject + was/were + being + third form of verb + by + object.

For Example:

• The building was constructed by the masons.( passive )

The subject is 'the masons' ,object is 'the building' and  'constructed'  is the third form of the verb construct. The subject 'the building' is singular so the helping verb 'is' is used.

While converting into Active Voice the rule will be :

:subject + was/were + first form of verb + ing + object.

In the question : -

That movie was being watched by my parents . 

The active form of above sentence for past continuous tense :

My parents were watching that movie. In this sentence , object ( that movie ) is converted into subject ( my parents ) , then use helping verb were because parents is a plural subject  , then use first form of verb watch with ing and then object( that movie) .

Thus , the Correct Option is A , which is My parents were watching that movie.

Active Voice : - In the active voice, the sentence's subject performs the action on the action's target.

Passive Voice : - In the passive voice, the target of the action is the main focus, and the verb acts upon the subject.

Rule used to identify that the sentence is in Passive Form with present continuous tense for negative sentences :

subject + is/am/are + not + being + third form of verb + by + object.

For Example:

• The truth is not being spoken by you.

The subject is the truth , object is you  and spoken is the third form of the verb speak . The subject ' the truth' is singular so the helping verb ' is ' is used .  It is a negative sentence , so we use not here .

While converting into Active Voice the rule will be :

subject + is/am/are + not + first form of verb + ing + object.

For Example:

• You are not speaking the truth.

The subject 'the truth ' will change into object( you  ) and the object 'the you ' will change into subject (the truth ). The subject 'The truth ' is plural so the helping verb 'are' is used. It is a negative sentence , so we use not here .

In the question : -

We are not being marked absent by the teacher.

The active form of above sentence for continuous tense :

The teacher is not marking us absent. In this sentence , object ( we ) is converted into subject ( the teacher  ) , then use helping verb is , then use not , then use first form of verb make with ing and then object( we ) .

Thus , the Correct Option is B , which is The teacher is not marking us absent.