Mr Green wants _____some fish (have)

Mr Green wants _____some fish (have)
Mr Green wants _____some fish (have)

Mr Green wants _____some fish (have)
to have
词组 want to do sth

wants to have.
一般，谓语后面要+动词要+to

to have 词组固定搭配want to do sth

want to do sth固定搭配
用to have