#1 is perfect.
#2 = do you see 3 names there? No way can you use the "yo" form to talk about all 3 of you! Look also at the adjective "alegres" which is also plural.
#3 = either you are speaking to Mario about both of you, or again there are 3 people involved.
#4 = the dog = WE are in the park? No.
#5 = incorrect because está requires the accent mark.
#6 = you got one!
#7 = the chairs = IT? No, that is plural and do not forget the required accent mark!
#8 = correct
#9 = correct if your textbook teaches vosotros/vosotras.
#10 = you are not talking TO Ana because there is no comma for direct address, so you are talking ABOUT Ana.
#11 = it IS plural but you are talking about 2 GIRLS: contentas
#12 = Marco (the subject) is singular, the verb is singular; how could he adjective be PLURAL? No.
#13 = note "los perros" = masculine plural, NOT feminine. No.
#14, #15, #16 , #17 = OK
Next time please don't skip so many lines. Skipping ONE line is perfect, or 2, but no more. It takes way too long for me to slide up, down, up, down.
#18 = la Argentina
#19, #20 = OK
How many correct out of 20? 10. Not good.
Spanish-Check please! I need help - Please check-I'm having a problem ...
Spanish Check?? - Check my spanish work on page 2 please? Anyone?
Spanish - Can someone please proofread my Spanish? Thank you. it will not let me...
Spanish-Please check - Please check-Thank you I come from the library. Yo vengo...
spanish - can anyone help me with my homework im a senior in high school and ...
spanish/check - translate to spanish our father's office -la oficina de nuetro ...
Spanish-Help - We learned different timeframes in We learned timeframes in ...
spanish - please check this: "Quieres ayudarnos a _____ periodicos?" "No puedo. ...
Spanish 7th grade-Please check - Please check. How would I say "I feel like ...
english/poem - I am suppose to do a funny sonnet poem that has 10 syllables per ...