College starts at 8:30 am and finishes at 4 pm.
⇒College starts at 8:30 am and doesn't finish at 4 pm.
I help my dad on the farm
⇒I don't help my dad on the farm.
Cấu trúc dạng phủ định ở present simple:
1.S+to be+not+O.
+Is not=Isn't
+Am not=Am not
+Are not=Aren't
2.S+do/does+not+O
+Do not=Don't
+Does not=Doesn't
#NOCOPY
#NOPLAGIARISM