Pouvez vous m'aidez sur une feuille d'exercices d'Anglais de 3e s'il vous plaît, je n'ai rien compris et j'en ai besoin rapidement merci.

a) I have been waiting you for twenty minutes.
b) She was doing her homework while her father was reading the newspapers.
c) Look, he felt!
d) We have been to the theater last month.
e) They have been on strike for weeks.
f) He was sleeping when i arrived.
g)The train have left since ten minutes.
h) I have never been to China
i) When did you bought those flowers ? I bought them yesterday.
j) Your hands are dirty ! Have you been painting?
k) It’s been raining for days.