Level 3 [ADVANCED]
New expression! Fanny, Dariel, Diana, and Fabian were very surprised to learn that "I invite you" does not mean "I'm paying" in English but that the expression is actually, "It's my treat."
Level 2a [INTERMEDIATE]
Jose S./NoMad noticed the difference between BE verb vs DO verb in questions right away. He explained to the other students, "BE verb is for questions about your 'estado,' and DO verb is for questions about an action." New word: state (estado). So, 'BE verb is for questions about your state of being.' Beautiful explanation!