Breakdown of Nie jestem w stanie tego zrobić sam.
to
this
nie
no / not
zrobić
to do / to make (someone something)
sam
alone / himself (emphatic) / pure / nothing but
Questions & Answers about Nie jestem w stanie tego zrobić sam.
Why use w stanie to mean "able to"?
The phrase być w stanie literally translates to "to be in a state", but it is a very common Polish idiom meaning "to be able to" or "to be capable of". It is used to express having the physical, mental, or situational capacity to do something.
Why does the sentence use tego instead of to?
This happens because of the "genitive of negation". Normally, the verb zrobić takes a direct object in the accusative case (which would be to). However, because the sentence is made negative by the word Nie, the direct object switches to the genitive case, which is tego. Even though the negative word is attached to jestem, it affects the object of the infinitive verb too.
How would a woman say this sentence?
What is the difference between saying Nie jestem w stanie and Nie mogę?
They are very similar, but Nie jestem w stanie (I am not capable / I am not in a position to) emphasizes a lack of resources, energy, or physical ability. Nie mogę simply means "I cannot", which could also imply that you are not allowed to do it or just don't have the time.