这句话几个句子,几个主谓宾,分别是什么We wish,however,to make it clear that in our future transactions,involved for each transaction is less than US$5,000 or the equivalent in RenminbiShould the amount exceed that figure，payment by letter of credit will be required.没写完，补上后半部分 involved在这里做定语，形容词，还是谓语动词。exceed呢，should是怎么回事，

这句话几个句子,几个主谓宾,分别是什么
We wish,however,to make it clear that in our future transactions,involved for each transaction is less than US$5,000 or the equivalent in Renminbi
Should the amount exceed that figure，payment by letter of credit will be required.
没写完，补上后半部分
involved在这里做定语，形容词，还是谓语动词。exceed呢，should是怎么回事，