متى تستخدم not؟

ﺗﺳﺗﺧدم ( not ) ﻟﺻﯾﺎﻏﺔ اﻟﻧﻔﻲ ﻣﻊ ﮐل اﻻﻓﻌﺎل وﻓﻲ ﮐل اﻻزﻣﻧﺔ . ﺗوﺿﻊ (not) ﺑﻌد اﻟﻔﻌل اﻟﻣﺳﺎﻋد ﻟﺗﺻﺑﺢ اﻟﺟﻣﻟﺔ ﻣﻧﻔﯾﺔ , وﮐﻣﺎ ﻓﻲ اﻻﻣﺛﻟﺔ اﻟﺗﺎﻟﯾﺔ : It is raining today → it is not raining today. has not commented on the report He had attended many meetings.