NumLingua

1. Present Tense---
A. Present Indefinite:

Structure: Subject + base verb (add s/es for he/she/it)
Example:
I play football.
She plays football.

B. Present Continuous:

Structure: Subject + am/is/are + verb+ing
Example:
I am reading a book.
They are playing football.

C. Present Perfect:

Structure: Subject + has/have + past participle
Example:
I have eaten lunch.
She has visited London.

D. Present Perfect Continuous:

Structure: Subject + has/have been + verb+ing
Example:
I have been studying English for 2 hours.