Would 一定是过去式吗?I ( ) and he would help me 中是用THINK 还是 THOUGHT

Would 一定是过去式吗?I ( ) and he would help me 中是用THINK 还是 THOUGHT If he were here,he would help me now.If he asked me,I would 11. He is not so much _______ a help as I thought he would b I didn’t think he would come,_____?填did I 还是would he the old man is not as much of a help as i thought he would b I thought I would Danny said he would help me with my English and so he ___ wo would you help me He asked how much I thought it would cost I don't think he would allow it.能否改成：I think he would not al Think of me and I'll be there You would always come around 的 I must think so还是I would think so?原因?