Sentence: He was tired because he had been exercising so hard.

[Rajaa Doghmoush]

# He was tired because he was exercising so hard.

# He was tired because he had been exercising so hard.

please someone help me
How do I differentiate between the two sentences?

[Peterkua]

"He was tired because he was exercising so hard" is Past Continuous - ongoing action that took place in the past.
"He was tired because he had been exercising so hard" is Past Perfect Continuous - ongoing action in the past that was completed

Peter Kua

[Rajaa Doghmoush]

Thanks alot Peter Kua