Esperar: yo espero, tu esperas, él/ella/usted espera, nosotros esperamos, ellos/ellas/ustedes esperan
Vender: yo vendo, tu vendes, él/ella/usted vende, nosotros vendemos, ellos/ellas/ustedes venden
Explanation:
Those are the only ones I'll answer, but I want to explain how conjugation works. If the explanation actually makes sense, let me know and I'll post the rest. I know it's a long answer, but hopefully, this should be able to get you through a good chunk of your Spanish class, especially if this is your first interest.
"Yo" in spanish translates to "I" in english. "Tú" translates to "you", when talking informally, which simply means you are talking to your best friend, for example. "Él/Ella/Usted" translates to "he/she", and "you", when talking formally, which simply means you are talking to a teacher, a police officer, the President; people you respect, or people with authority. "Nosotros" translates to "we". "Ellos" translates to they, when you are referring to either a group of only guys, or a group of guys and girls. "Ellas" translates to they when referring to a group of only girls. "Ustedes" translates to "you all", when you are talking directly to a group of people.
There are irregular verbs in Spanish, which means they don't follow the traditional rules of conjugation, and have their own special conjugations for certain tenses (for example, the verb "querer", which translates as "to want". You might have heard someone begin a sentence with "yo quiero", which translates to "I want". For all tenses except "nosotros", the verb "querer" is irregular. "yo quiero", "tú quieres", "él/ella/usted quiere", "nosotros queremos", "ellos/ellas/ustedes quieren".
The general rule, however, is this:
The "yo" form of a verb ends in an "-o". For example, "yo canto", meaning "I sing". You drop the "verb ending", which is either:
"-ar", as in "cantar" (to sing), "buscar" (to look/search for), or "hablar" (to talk)"-er", as in "comer" (to eat), "correr" (to run), or "vender" (to sell)"-ir", as in "escribir" (to write), "vivir" (to live), or "recibir" (to receive).
In these examples, conjugating "cantar" becomes "yo canto", "buscar" becomes "yo busco", "hablar" becomes "yo hablo".
"Comer" becomes "yo como", "correr" becomes "yo corro", and "vender" becomes "yo vendo".
"Escribir" becomes "yo escribo", "vivir" becomes "yo vivo", and "yo recibo".
The rest follow suit: the "tú" ending of a verb is either "-as" for "-ar" verbs, but ends in "-es" for BOTH "-er" and "-ir" verbs. (This is important to remember.) Examples are:
"tú cantas", "tú buscas""tú comes", "tú corres""tú vives", "tú escribes"
"Èl/ella/usted" forms of a verb all end in "-a" for "-ar" verbs, and "-e" for "-er" and "-ir" verbs. Examples are:
"él/ella/usted canta", "él/ella/usted busca""él/ella/usted come", "él/ella/usted corre""él/ella/usted vive", "él/ella/usted escribe"
"Nosotros" forms of a verb end in "-amos" for "-ar verbs", "-emos" for "-er" verbs, and "-imos" for "-ir" verbs. In this tense, each type of verb has its own ending. Examples are:
"nosotros cantamos", "nosotros buscamos""nosotros comemos", "nosotros corremos""nosotros vivimos", "nosotros escribimos"
"Ellos/ellas/ustedes" forms of a verb follow the same rule as "él/ella/usted", and end in "-an" for "-ar verbs", and end in "-en" for BOTH "-er" and "-ir" verbs. Examples are:
"ellos/ellas/ustedes cantan", "ellos/ellas/ustedes buscan""ellos/ellas/ustedes comen", "ellos/ellas/ustedes corren" ellos/ellas/ustedes viven", "ellos/ellas/ustedes escriben"
Please let me know if any part of this was unclear, and I'll do my best to explain it differently, but again, this should serve as a fairly comprehensive guide.
