simple present

FORMACIÓN DEL "SIMPLE PRESENT": TO THINK

Afirmativa	Interrogativa	Negativa
I think	Do I think?	I do not think
You think	Do you think?	You do not think
He thinks	Does he think?	He does not think
She thinks	Does she think?	She does not think
It thinks	Does it think?	It does not think
We think	Do we think?	We do not think.
They think	Do they think?	They do not think.

NOTAS SOBRE LA TERCERA PERSONA DEL SINGULAR DEL "SIMPLE PRESENT"

• En la tercera persona del singular, el verbo siempre termina en -s:
  he wants, she needs, he gives, she thinks.
• Para las formas negativa e interrogativa, se emplea DOES (= tercera persona del auxiliar 'DO') + el infinitivo del verbo.
  He wants ice cream. Does he want strawberry? He does not want vanilla.
• Verbos que terminan en -y : en la tercera persona del singular, se cambia la -y por -ies:
  fly --> flies, cry --> cries
  Excepción: cuando una vocal precede a la -y:
  play --> plays, pray --> prays
• Añadimos -es a los verbos que terminan en:-ss, -x, -sh, -ch:
  he passes, she catches, he fixes, it pushes

EJEMPLOS

• He goes to school every morning.
• She understands English.
• It mixes the sand and the water.
• He tries very hard.
• She enjoys playing the piano.