The meaning of simple present tense is the functions of it, there are :
1. to indicate a situation that exist right now.
2. For general statement/ fact.
3. For habitual action.
    Example :

•     They have a new car.
•     The ball is circle.
•     I study everyday

Form of Simple Present Tense :
• Verbal sentence
(+) S + V1 + (s/es) + O/C/adv
(-) S + do/does + not + V1 + O/C/adv
(?) Do/does + S + V1 + O/C/adv + ?
• Nominal sentence
(+) S + To be + O/C.
(-) S + To be + not + O/C.
(?) To be + S + O/C + ?
*Note :
5w1h question + To be + S +…
Ex : Why is he angry??
(5w1h question: Why, when, what, where, who, dan how)

Adverb of time :

• Always
• Never
• Every
• Regulary
• Often
• Usually
• Sometimes
• Everyday
• Seldom
• …etc….