1. SIMPLE PRESENT
I think you think he,she, it thinks, we think, you think, they think.
The simple present is very simple in form, and that is why many learners think that verbs in English are easy.
Indeed, what could be easier to learn than this?
In this form of the verb, only the 3rd person singular changes in any way, and it adds only 's' to the main stem.
Thus:
- I, we, you, they
- think
- he, she, it
- thinks
There are hardly any exceptions. The verb 'to be' is an exception.
- I am
- we are
- you are
- you are
- he, she, it is
- they are
Some verbs take 'es' in the 3rd person singular.
- I do
- s/he it does
- I go
- s/he goes
- I fish
- s/he fishes