Question

He didnot understand fully, what he was supposed to do(use:lacked)​

Answer 1

He lacked a full understanding of what he was supposed to do.

Explanation:

• Sometimes instructions are given to change the given sentences in English grammar.

• As we are directed to add "Lack" in the sentence, the meaning of the sentence should remain the same.

• When we add lack in the sentence can be turned into negative or positive or vice verse.

• The second form of the verb is mostly used in the Past tenses, whereas the first forms of the verb are used in Present tenses.

• The punctuation should be kept in mind as improper use of punctuation can change the meaning of the sentence.

Answer 2

Correct sentence:

He lacked his understanding on what he was supposed to do.

Explanation:

• In this sentence, the words "did" and "not" are replaced with "lacked." The word "lack" has a negative meaning.
• The synonyms of lack is missing or absent.
• The word "lacked" is followed by continuous verb and its preposition is "on."
• In this sentence, the subject is missing his knowledge on something.