Question

Transform the given sentence by replacing the word “if” with the most appropriate word-
If the vehicle had been parked in the wrong place, it would have been towed away.
a) Had the vehicle been parked in the wrong place, it would have been towed away.
b) Whether the vehicle was parked in the wrong place, it would have been towed away.
c) Unless the vehicle was parked in the wrong place, it would have been towed away.
d) Has the vehicle been parked in the wrong place, it would have been towed away.

Answer 1

Hint: ‘If' is a conjunction that is used to express uncertainty about whether an action (or event or condition) will occur. In the event, the particular action (or event or condition) occurs, then the other event is likely to occur.

Complete answer:
 In the given question, we are asked to transform the given sentence ‘if’ with the most appropriate word. The sentence is – If the vehicle had been parked in the wrong place, it would have been towed away. We will check which of the given sentences is grammatically correct.
Now, let us examine all the given options to find out the correct option :
Option ‘a’ – The auxiliary verb ‘had’ can be used to replace the word ‘if’ in a conditional sentence in the past tense. The given sentences in the past tense. So, ‘had’ can be used. ‘Had' is used along with the past participle form of the main verb. The main verb is ‘was parked' whose past participle form is ‘been parked'. So, the clause, “if the vehicle was parked in the wrong place” can be replaced by “had the vehicle been parked in the wrong place”.
Option ‘b’ – ‘Whether’ is a conjunction that is used to express a choice between two alternatives or events. Here, there is no such reference for any given alternatives or choices. So, this is an incorrect option.
Option ‘c' – The word ‘unless’ is used to replace ‘if...not'. in the given sentence, the word ‘not’ isn’t used. So, this is an incorrect option.
Option ‘d' – it is an obvious incorrect option because a conditional sentence cannot start with ‘has I'. Also, this sentence is also grammatically incorrect as the auxiliary ‘has' is used with third person singular nouns/pronouns and not with I (first person singular pronoun).
As we have analyzed all the given options, we can easily figure out the correct answer. Here, the correct sentence after replacing the word ‘if’ is – Had the vehicle been parked in the wrong place, it would have been towed. Hence, option ‘a’ is the correct option.

Note:
Don’t get confused between option ‘c’ and ‘a’. Option ‘c’ is having the world unless which cannot be replaced with ‘if’. This where the meaning of the sentence will completely change.