Je vous en supplie je ne comprend rien c'est trop dur si vous pourriez m'aidez ce serai super sympa merci ✨

Exercise 1
How long has our teacher been ill?
How long have you got a headache?
How long has David worked in an American lab? 
How long has your brother had a new motorcycle?
How long has he been married?
How long has he lived in Switzerland  

Exercise 2
How long did you have to wait for the train?
How long are you staying?
How long does he play the piano every day?
How long can she run without stopping?
How long will they be away?
How long has he wanted to be a photographer?