PRESENT TENSE

The simple present or present simple is one of the two present tenses used in modern English, the other being Present continuous.

There two kinds of simple present tense :

1. NOMINAL SENTENCE
(simple present tense without verb)
Formula :
(+) S + Tobe + Adj/Noun/Adv
(-) S + Tobe + not + Adj/Noun/Adv
(?) Tobe + S + Adj/Noun/Adv ?

Example :

(+) They are tired
(-) They are not tired
(?) Are they tired ?

2. VERBAL
(simple present tense with verb)
Formula :
(+) S + V1 (s/es) + O/C
(-) S + do/does + not + V1 + O/C
(?) Do/does + S + V1 + O/C  ?
 
The some frequency that use in simple present tense :
- Always
- Usually
- Often
- Never
- Sometimes
- Seldom

Examples :
- I always remember you
- They are usually here
- We often eat in restaurant
- I never cry
- She sometimes forgets
- He seldom studies

Uses of present simple:
We uses the present simple for describes general truths, facts and scientific laws.
Example : the earth moves round the sun.

- We use the present simple for direction.
Example : the earth moves round the sun.