Questions & Answers about Quiero que cambies tu actitud conmigo.
Why is it cambies and not cambias?
Because of the phrase quiero que (I want you to / I want that). When you express a desire for someone else to do something, Spanish requires the subjunctive mood for the second verb. For regular -ar verbs like cambiar, the subjunctive tú (you) ending is -es, making it cambies.
In English we say 'I want you to', so why isn't there a word for 'you' like te or tú right after quiero?
Why is it conmigo instead of con mí?
In Spanish, the preposition con (with) and the pronoun mí (me) always merge into the special word conmigo. You will never say con mí. The same thing happens with 'with you,' which becomes contigo.
Is actitud masculine or feminine?