there is a sentence "always thinking too much..." Is this sentence right or wrong? if right, why r we using thinking not think? thank you
The phrase would typically be "always think too much".
As well, the progressive form can indicate that something is temporary, and not a permanent quality, characteristic, or behavior. In your example phrase, the progressive form expresses emphasis. It sounds stronger than the simple form.
You're always thinking too much. - more emphatic and stronger
You always think too much. - normal expression