when should I use “think” and “thought?”
when should I use “think” and “thought?” I thought all "think" was happended action before I speak it out.? so, no" think" will be used . Is it right ?

Question

when should I use “think” and “thought?”
when should I use “think” and “thought?” I thought all "think" was happended  action before I speak it out.? so, no" think" will  be used .  Is it right ?

Answer

You should use this word depending on the desired time.
Think - is present time
Thought - is past time

Answer

'thought' will either indicate the past tense, the action of thinking happening in the past :

"When I was young, I thought, that money was the most important thing in life."

or you could use it in a present time at the moment to refer to uncertainty,when you expect or supose something ,but you are not sure of it:

"I thought ,you would like to come with us."

"think" in the present tense always refers to a present action of thinking about or of something.

"I think, I will have to call her now."

Answer

I always thought I am very smart, but now I think  I am wrong in this case.

Answer

i THINK you have understood this example.THINK =present simple tense
I THOUGHT you had not learnt your lesson=thought= past simple tense and this is irregular verb.