Natalie... You have to take into account that there are two kinds of verbs that can be next to eachother. For example in English: I want to go and I can go In the first case you have two verbs, the first one is conjugated by "I" and the second one is in infinitive form marked by the particle "to" (which indicates that the verb is in infinitive form). In the second sentence, you have first an auxiliary verb (can) and a second verb with no "to" whatsoever. That is because when you combine two verbs and the first one is an auxiliary verb, the second verb needs no "to" to mark the infinitive form. In Spanish something similar occurs. In your fisrt sentence "I think we should"... "should" is a auxiliary verb, though originally is a deformation of "shall" it is now used as the conditional form for "must". In Spanish we say "creo que deberíamos" And in the case of your second sentence "I know I am", this can be "sé que soy" or "sé que estoy". If you have any questions about when to use "ser" or "estar" is very easy, "ser" is a permanent condition, whereas "estar" is temporary. Él es inteligente (he is smart, and everything indicates he will always be) Él está inteligente (he is smart (today), contrary to previous demonstrations and future expectations) I hope my answer helps you. Cheers, Mario

Hello, I think we should write : "creo que deberíamos" y "sé que estoy" pero no soy nativo hispanohablante ... entonces no sé si tengo razón . I hope it helps :) you can type the accents that way : á= alt+0225 é= alt+0233 í = alt +0237 ó= alt +0243 ú= alt +0250