Is the construction of sentence a) is correct?
a) This tree was fallen on my bike.
As per my understanding above sentence is incorrect because fallen is an intransitive verb. And the sentence should be
b) This tree fallen on my bike. (Simple past, Statative)
c) This tree had fallen on my bike. (Past perfect)
But if I want to tell someone the status of tree, can I say as below?
d) This was the tree which fallen on my bike.
Should I simply say?
e) This was the tree which felled on my bike. (Simple past)
Also, it could be passive voice if I use an agent
f) This tree was fallen on my bike by wind. (passive voice)