Can you check if my paragraph is grammatically correct in passé composé?

j'ai vu un blanc chien. Je suis allé à classe de piano. J'ai allé à guitare classe. J'ai suis à mon amie's maison. Nous sommes joué au tennis. J'ai fait mon travail pour école. J'ai allé sur Tumblr and j'ai parlé avec mon amies. à dix heures du soir je suis allé au lit.

I'll send this to SraJMcGin, our French expert.

I see by the name "Lauren" that you are female. With the passé composé using the verb être, the past participle must reflect that when the subject is "je." = Je suis allée... Sentence 3 again is the verb aller (verb of coming, going, going up, down, out, etc.) using être = Je suis allée ¡a la classe de guitare.

Because you give no English for what you are trying to say, I'm not exactly sure what sentence #4 is saying = I went to my friend's house? Also remember that in French there is no "'s" for possession. = Je suis allé ¡a la maison de mon amie. (word order is bad here.)

We played tennis = this does NOT use être but avoir as the helping verb = Nous avons joué au tennis. Often in French, the definite article is used = pour l'école.

Because I'm not sure what "Tumbir" is, at least it will be "Je suis allée....... In French, if the noun is plursl, so are all the adjectives modifying it = avec mes amies.

A new sentence must capitalize the first word...`A dix heures. ....je suis allée au lit. To vary this a bit so you aren't using the same verb all the time, you might say..."je me suis couchée (I went to bed, Reflexive verbs also use être, in case you haven't gotten that far.)

I'll flag this so I can come back later to see if you have additional questions. Also, you might want to redo the entire paragraph so I can verify everything, if you have time.

Sra (aka Mme)

Sure! I can check if your paragraph is grammatically correct in passé composé.

j'ai vu un blanc chien. (I saw a white dog.) - Correct.

Je suis allé à classe de piano. (I went to piano class.) - There is a mistake in this sentence. The correct way to say it would be "Je suis allé(e) à la classe de piano" since "classe de piano" is a feminine noun. Additionally, "allé" should agree with the gender of the speaker, so if you are female, it should be "Je suis allée à la classe de piano."

J'ai allé à guitare classe. (I went to guitar class.) - There is a mistake in this sentence as well. The correct way to say it would be "Je suis allé(e) à la classe de guitare" following the same rules as before.

J'ai suis à mon amie's maison. (I went to my friend's house.) - Another mistake in this sentence. The correct way to say it would be "Je suis allé(e) chez mon amie" meaning "I went to my friend's place."

Nous sommes joué au tennis. (We played tennis.) - This sentence is incorrect. The correct way to say it would be "Nous avons joué au tennis." "Joué" is the past participle of the verb "jouer," and "avons" is the auxiliary verb used with the subject "nous."

J'ai fait mon travail pour école. (I did my schoolwork.) - This sentence is correct.

J'ai allé sur Tumblr and j'ai parlé avec mon amies. (I went on Tumblr and I talked with my friends.) - There are mistakes in this sentence. The correct way to say it would be "Je suis allé(e) sur Tumblr et j'ai parlé avec mes amies." "Allé(e)" and "parlé" should agree with the gender of the speaker, and "mes" is used to indicate possession with plural feminine nouns like "amies."

à dix heures du soir je suis allé au lit. (At ten o'clock at night, I went to bed.) - This sentence is correct.

So, to summarize, here is the corrected version of your paragraph:

J'ai vu un chien blanc. Je suis allé(e) à la classe de piano. Je suis allé(e) à la classe de guitare. Je suis allé(e) chez mon amie. Nous avons joué au tennis. J'ai fait mon travail pour l'école. Je suis allé(e) sur Tumblr et j'ai parlé avec mes amies. À dix heures du soir, je suis allé(e) au lit.