although

[mengta]

John failed his math test, although he was studying hard.
can i ommit the "he was" and say, "John failed his math test, although studying hard?"

thanks

[mykwyner]

No, you cannot.

[Volcano1985]

Originally Posted by mengta

John failed his math test, although he was studying hard.
can i ommit the "he was" and say, "John failed his math test, although studying hard?"

thanks

you can do like this

"John failed his math test, despite studying hard"

[curmudgeon]

John failed the math test although/even though he studied hard

[mengta]

Although studying hard, John failed his math test.

is this one correct?

[Tdol]

No; it's 'despite' again- use 'despite' with a gerund.

[MikeNewYork]

Originally Posted by mengta

Although studying hard, John failed his math test.

is this one correct?

No, that doesn't work. "Despite" puts the present participle in the past better than "although". The studying preceded his failed exam.