USE OF WOULD

Would (modal verb) Meaning 4: used to refer to future time from the point of view of the pastExamples: He said he would finish it the next day.I knew it would be difficult to persuade her to marry me.Meaning 5: 'would have' is used to refer back to a time in the past from a point of view in the futureExample: We thought they would have arrived before midnight, but they were delayed by traffic.Meaning 6: used to express an opinion in a polite way that is not too directExamples: I would imagine we need to consult a lawyer about this matter.I wouldn't agree with you there.