cofusion to find out doer

[satya_sson33]

good morning sir

please clear my confusion

He erases the evidence by rubbing.(he rubs and evidence is erased)
there is two action is performed but confusion is that if he rubs evidence then who erased it? because erasing is result but who is doer of result.
we can make hundreds of sentences like this.

He erasing the evidence by rubbing.
She kills the worms by stepping on them.
The job was completed early by working seven days a week.

[5jj]

g Good morning, sir.
Remember that many of the people who respond to questions are female.

pPlease clear up my confusion.

He erases the evidence by rubbing.space(h He rubs and evidence is erased).
The sentence you quote is strange in that 'erasing' and 'rubbing out' are frequently near-synonyms. You are in effect say "He erases the evidence by erasing it". However, if we accept the sentence, then it is clear that 'he' erases/rubs out, etc the evidence.
there is two action is Two actions are performed but the confusion is that if he rubs out the evidence then who erased it? b Because erasing is the result but who is doer of result. We can't really speak of 'the doer of a result'.

Please try to use capital letters and punctuation marks appropriately.

Let's move on to the second example, which is a possible sentence: She kills the worms by stepping on them. There is only one action - she steps on the worms. As a result of this, the worms die. We can say, therefore, that she kills the worms. We can also say that the worms cease to live. We could say perhaps that she commits lumbriciciniide. We could perhaps think of several other ways of talking about this brutal act. There is no confusion.