Incorrect: He is going to home.
Correct: He is going home.
The preposition ‘to’ is not normally used with ‘home’.
Incorrect: The children have been playing since two hours.
Correct: The children have been playing for two hours.
We use ‘for’ to indicate duration. ‘Since’ is used with the starting point of action.
Incorrect: An ordinary man’s life is different from a minister.
Correct: An ordinary man’s life is different from that of a minister.
Do not omit the words ‘that’ and ‘those’ in comparisons.
Incorrect: He hit me by a stick.
Correct: He hit me with a stick.
The preposition ‘by’ shows the agent – the person who performs the action. The preposition ‘with’ shows the tool with which the action is performed.
Incorrect: I need a pen to write.
Correct: I need a pen to write with.
Incorrect: Many people died by cholera.
Correct: Many people died of cholera.
Incorrect: India has been independent for 1947.
Correct: India has been independent since 1947.
Incorrect: I am ill since three weeks.
Correct: I have been ill for three weeks.
In expressions with ‘for’ and ‘since’, we normally use the present perfect and present perfect continuous tenses.
Incorrect: This paper is inferior than that.
Correct: This paper is inferior to that.
After adjectives like inferior, superior, senior and junior, we use the preposition ‘to’ instead of the preposition ‘than’.
Incorrect: This is different to that.
Correct: This is different from that. / This is different than that.