what is the different between thought and thinking

hi pawan The word 'thought' (as a verb), denotes past tense. "I thought about you yesterday." "If you thought I was going to be late, you were wrong." The word 'thinking' is the gerund of the word 'thought.' It may be used as a verb or a noun. "She's been thinking (planning) to move back to Hanoi." "My thinking (my opinion) is that George will lead the group."