¡Hola Natali! I am gonna explain you this in english with the purpese that you understand better: In the Spanish language we do not use to use 'roturado', it do is a correct word but it is not used, insted of that we say (at this case) 'quebrado'; take in count that this verb 'quebrado' is in participle, in spanish the participle is the termination 'ado', 'ido', 'do', 'so', 'cho'... I know, getting complicated but don't worry. So, the infinitive form of the verbs in spanish is the termination 'ar', 'er', 'ir', in this case 'quebrAR' is the infinitive form which means TO break where 'to' becomes in infinitive the verb. 'Till here, all clear? Well, when an action have happened but it is still having an effect in the present you can say that is participle, if you say 'quebrADO' you have conjugated the verb, like TO break (infinitive) and broken (participle). Let me give some examples with some of the most common verbs: caminAR (to walk), caminADO (walked); comER (to eat), comIDO (eaten); dormIR (to sleep), dormIDO (slept). In the second sentence it's complicated explain why you cannot use SE LE. The correct form would be "Le han robado las llaves", do you notice the difference between 'robADO' and robANDO? ANDO is the termination for the gerund, like ING in english. The thirth one is ok. The last one: "Siempre olvido las llaves en la casa", it is not necessary to use ME like "siempre ME olvido las llaves en la casa". The Spanish language includes the pronoun in the verb conjugation, when you say 'olvido' is understood that is me. Muchas gracias = Thanks a lot :)

Hi! Well, if you use it for 'them' it is "Vengan conmigo", "vengan" is the verb to come in plural, used with 'ustedes'= you and 'ellos'= they. In singular you can use "Ven conmigo".