In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'. I shall be returned from school(P)/ by the time(Q)/ you come back from work. (R)/ No error(S)?

Option 1 : P

The error lies in part P of the sentence. Therefore, the correct answer is option 1.

The tense used in the sentence is incorrect. It should use the future perfect tense to describe an action that will be completed at a given point of time in future. The rule being subject+shall/will be+past participle of the verb. In this case, it should have been 'shall have returned'  instead of ' shall be returned.'

For example:

Before you reach his home, he will have left that place. 

The correct sentence is:

I shall have returned from school by the time you come back from work.