Составить 5-7 предложений о профессии которая нравится (доктор) и 5-7 о которой не нравится(механик) (почему нравится и не нравится)

Iam going to be a doctor. i like this profession because doctors help people to be healthy and live long. ambulance doctors often save human  lives in emergency. medical care is very complicated profession, it requires deep knowledge of chemistry, biology, anatomy  and many other sciences. doctors effectively  study and upgrade their skills all over their career. maybe i will be a  dentist, they earn lots of money.  = = =  i am not going to be a mechanic. i'v never seen a mechanic girl. this profession is popular rather at boys because they like to deals with nuts and bolts and dirty noisy  engines full of oil. sometimes mechanics have to move hevay stuff by hands, sometimes they undo hard tightened nuts. this kind of job is definitely  not for me. also i am afraid of welding that mechanics do sometimes, i think it is not safe.

Мені здається що потрібно добавляти закінчення-ed або 3 колонка неправильних дієслів, тобто has wanted, have recorded, have lost(V3). Але якщо чесно я не впевнена,так як не бачу в який час потрібно перетворювати речення)Але якщо я правильно зрозуміла і це Present Perfect то повинно бути так