Помогите пожалуйста!!!! Употребить в правильной форме Present Perfect, Present Continuos,

1)What are you(to do) here?- I am (to write) a letter to my friends?

2) Who (to write) hus artiete?

3)What language you (to study)?

4) We (to learn) a lot of English words ( a lready)

5) What she (to iteach) them?

6) What just (to do) some thing for us

7) You (to find) the book?

1)What are you doing here? - I am writing a letter to my friends

2) Who have written hus artiete?

3)What language you are studing?

4)We has already learned a lot of English words

5)What she has iteached them?

6)What have just done something for us

7)Have you found the book?

Как-то так, но вот некоторые слова в вашем запросе с ошибками например hus artiete