"Matěje sis nevážila."

Translation: You did not respect Matěj.

[mattvick]

Why does the verb end with an ‘a’ when Matej is male?

[relox84]

Matej is the object, the subject is "you". The verb agrees with the subject, so it can end in -a if "you" is female. Here both nevážil and nevážila are correct.

[kacenka9]

I am afraid it is not correct. The subject in the Czech sentence is some unknown female who did not respect Matej. I am telling her that she did not respect him and since she is a female, there is an A at the end.

Now, when we translate from English to Czech, we cannot tell who did not respect Matej without context and accept both NEVÁŽIL and NEVÁŽILA

[BrianG1941]

Why is the subject you and not she. I thought for you one would have to use jsi nevazila

[Renardo_11]

The notes say on this topic: “The singular familiar auxilary -s that latches onto host words obligatorily merges with the verb particles, forming the reflexive auxiliaries ses and sis.”

So, first, there is this “familiar” -s instead of “jsi.” And second, with reflexive verbs it merges with the reflexive pronoun “se” or “si.”

[Fnd68]

Is "Matěje sis jsi nevážíla" correct?

[VladaFu]

No, it is not. The sis is already a combination of si and -s. The -s is a proclitic form jsi.