A teacher is (a)___ compared with (b)___architect. He is called (c)___ an architect of a nation. He is the light of (d)___ and makes the illiterate people (e)___citizens of our country. But it is a matter of regret (f)___ the teachers are not held (g)___ due respect in (h)___ society. They lead a humble life in the midst of want. Still they keep the light of education burning in order to remove the (i)___  of illiteracy and superstitions (j)___ the society.

We are not ungrateful to the freedom fighters.

Their contribution is the greatest thing. 

An imperative sentence expresses a command, request, advice, or suggestion. It typically starts with a base form of a verb, and the subject 'you' is often understood but not stated. To form a negative imperative, 'Do not' or 'Never' is placed at the beginning of the sentence.

In the given sentence, "You should never disrespect or forget our martyrs," 'should never' indicates a strong suggestion or advice against an action. To transform this into an imperative sentence, we remove the implied subject 'you' and the auxiliary 'should', directly starting with 'Never' to convey the strong negative command or advice.

Our government has built the national memorial with a view to paying tribute to their memories. 

 (e) A freedom fighter is greater than any other son of the soil.

Our independence was got/gotten by us for their sacrifice.