Identify the option which makes the correct use of the adverb.
a) You should be punctual always
b) You always should be punctual
c) You should always be punctual
d) You should be always punctual.

Hint:An adverb is a word that adds on to the meaning of the verb in a sentence, in this sentence we see that ‘always’ is the adverb and an adverb of frequency.

Complete answer:
For this question, the grammatical rule says that if a sentence has one verb, place the adverb of frequency in the middle of the sentence so that it is positioned after the subject but before the verb. Hence, according to the question given, 'You' is the subject in the sentence and 'be' is the verb hence 'always' should be placed after the subject and before the verb.

Now, in option a, we see that the adverb ‘always’ is placed at the end of the sentence, which makes the option incorrect according to the grammatical rules we discussed above.

Option b is also incorrect as we know that although the adverb is in the middle of the sentence, yet it is not immediately before the verb.

We see that in option c, the sentence fulfills all the requirements of the given rule, which means that the sentence has the adverb placed after the subject and before the verb. Hence this is the correct alternative.

Lastly, option d is incorrect as, simply, the adverb is placed after the verb, which goes against the aforementioned rules.

Note:
In several options, we see that although the placement of the adverb looks correct, it might not be perfectly appropriate as per the rules, so we need to be very careful while selecting the answer.