Find out which part of the sentence has an error? Choose the correct option :
Supposing if it rains, what shall we do?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → supposing if
Supposing already means "if" or "what if", so it is not followed by another "if".
Supposing if — Error. "if" is superfluous; it should be just Supposing (or just "If").
it rains — No error. The simple present is right in a condition about the future.
what shall — No error. "Shall" with "we" asks for a decision or suggestion.
we do — No error.
Corrected: Supposing it rains, what shall we do?
Example: Supposing the train is late, how will you reach the airport?
Contrast: "Supposing it rains" or "If it rains", never both together.