Simple future tense
Rumus:
(+) Subject + Will/Shall + Verb + Object atau Subject + to be (am/is/are) Going to + Verb + Object
(-) Subject + Will/Shall + Not + Verb + Object atau Subject + to be (am/is/are) + Not + Going to + Verb + Object
Contoh:
(+) I will clean my room
(+) My boyfriend is going to meet me in my house
(-) I will not clean my room
(-) My boyfriend is not going to meet me in my house
Present perfect tense
Rumus:
(+) Subject + Has/Have + Verb 3 + Object
(-) Subject + Has/Have + Not + Verb 3 + Object
Contoh:
(+) I have studied math for 3 years
(-) I have not studied math for 3 years
Past perfect tense
Rumus:
(+) Subject + Had + Verb 3 + Object
(-) Subject + Had + Not + Verb 3 + Object