In reporting questions the verbs like asked, inquired are added.In reporting commands and requests, the verb expressing command or request is added and the imperative is changed into the infinitive.now becomes then, today becomes that day, yesterday becomes the previous day, this becomes that etc.
This is also true if the statement is a universal truth. When we convert a sentence from direct to indirect speech, we make the following changes: The word ‘should’ in the given sentence suggests that it can be considered as an encouragement/suggestion. The sentence is in direct speech and is an imperative statement.
