Simple present tense is used to :
* state facts and genaral truths.
EXM: elephants have trunks and tusks.
*show habitual actions which are things a person does gradually.
EXM: I brush my teeth every night before I sleep.
* build imperatives.
EXM: take this box to the storeroom.
- some words that signal the use of simple present tens are: today,every night,usually,often.