If I had gone to bed early, I ______ the train.

• যদি Had/ If যুক্ত clause টি Past perfect tense হয় তাহলে পরের clause টি তে subject এর পর would have/could have/might have বসে এবং এরপর verb এর Past participle form হয়।
Example:
If I had tried, I would have passed.
If I had gone to bed early, I would have caught the train.