Would have come - conditional III

[Guest]

Test No. incompl/inter-90 "Tenses", question 1

I ......... come if I had had time.

(a) have
(b) had
(c) would have
(d) did

Test No. incompl/inter-90 "Tenses", answer 1

I would have come if I had had time.

Correct answer: (c) would have

Your answer was: incorrect
I had come if I had had time.
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why didn't you use "had"

[Torsten]

This is a Conditional III construction which has two clauses, one that expresses a condition and one that describes the result. The condition clause starts with the word if and is followed by a Past Perfect construction. (If I had come earlier.) As you know the past perfect is made up by a form of have + past participle of the verb and the past participle of come is come.
The second clause of the third conditional describes a result and consists of would + have + past participle.
Sometimes the if-clause appears first and sometimes the would-have clause appears first in a sentence:

If I had left earlier I would have caught the train.
I would have caught the train if I had left earlier.

Let me know if this makes sense to you.
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