Question

if he had explained the problem .I would have helped him ( begin the sentence with had)​

Answer 1

Answer:

Had he explained the problem

Explanation:

Answer 2

Correct Answer:

Had he explained the problem, I could/would have helped him.

Explanation:

• When we talk about the grammar of doubt and uncertainty, we are talking about the use of the so-called modals, or the auxiliary verbs that indicate conjecture, supposition, or belief rather than established facts or absolute certainty.
• These auxiliary verbs are, of course, “can,” “could,” “must,” “might,” “may,” “should,” “shall,” “ought to,” “will,” and “would.”
• When we say “Gina might dance,” for instance, we are conveying the idea that Gina knows how to dance but we are not sure that she will do so under the circumstance that we have in mind. However, we see no need to state a condition for what she might decide to do.

• On the other hand, when we talk about the grammar of conditionality, we are talking about how to convey the idea that a particular action can take place only if a certain condition or set of conditions is fulfilled.
• For instance, when we say “If Gina likes the music, she would likely dance,” we are indicating that it’s likely for Gina to dance if the music suits her fancy.
• There’s a condition for what she would likely do, unlike in the case of the modal sentence “Gina might dance,” which is simply a supposition or belief.

• Based on this distinction between modal statements and conditional statements, we definitely can conclude that modality isn’t the same as conditionality.
• They are different modes of expression altogether. It would therefore be a stretch if not altogether ill-advised to attempt to make the grammar of modals explain why the conditional sentence below starts with “had” and not with “if” as expected of a conditional sentence:

“Had Jon joined in an hour after Jess started working, the job would have been finished in 7 hours.

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