Bonjour :)
Réponse en explications étape par étape :
- Question : Conjugate verbs in parentheses in the following sentences in the present perfect simple :
1) She (to do) so much for him !
====> She has done so much for him !
2) You (to sell) all your stamps.
====> You have sold all your stamps.
3) I (not to finish) my work here.
====> I haven't finished my work here.
4) He (to go) to Italy with Sarah.
====>He has gone to Italy with Sarah.
5) They (not to make) their beds.
====> They haven't made their beds.
Voilà