Verb tense tells you when the action happens. There are three main verb tenses: present, past, and future. Each main tense is divided into simple, progressive, perfect, and perfect progressive tenses.
Things to remember about simple tense:
Fill in the blanks with appropriate verb forms.
(i) I ____ a song at the concert yesterday.
(ii) He ____ a letter to his girlfriend tomorrow.
(iii) I ____ to the library to borrow some books this weekend.