Yi Wei= thought (I think you are nice) Jue de= explaining your feelings (I think chinese is difficult )

'I thought' is in the past tense, and is used for situations where what you thought has turned out to be wrong. 'I thought you had the keys'. 'I think' is in the present tense, and is for situations where you are not absolutely sure that what you think is right. 'I think we should turn right here.'

我以為你去了吃飯 = I thought you went to eat? (Actual meaning: I wrongly thought you went to eat, but it looks like you didn't) 我想你現在去吃飯 = I think you're going to eat now (Actual meaning: I think you're about to go and eat now) 以為 = An incorrect thought 覺得 = feel / think 認為 = think 想 = think, but less often...can also mean want/miss (i.e. think of) hope that helps