The word "that" is optional is english, unlike in other languages, like french and spanish where it is mandatory. So either sentence is correct.
20 de septiembre de 2014
2
2
2
Here "that" is used as a conjunction. Without it, it could be two unrelated sentences:
"I think you don't think."
"I think. You don't think."
"I think that you don't think."
19 de septiembre de 2014
0
2
1
Both are correct but 'I think you are' sounds better.
19 de septiembre de 2014
0
1
1
Both
19 de septiembre de 2014
0
1
0
Technically, "I think that you are..." is grammatically correct and should be used in formal publications. However, most native speakers say "I think you are..." in everyday conversation.
5 de abril de 2015
0
0
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!