The germination rate is low and the time is long, so it maybe have the mechanism of dormancy.

首先网友以上句子,后面句子中谓语动词have应该要改为has

【1】The germination rate is low and the time is long, so it maybe has the mechanism of dormancy.

【2】=The germination rate is low and the time is long, so it may have the mechanism of dormancy.

备注:用来作状语的副词maybe可以用表示推测的情态动词may(可能)进行替换。第1句中的maybe has为副词+谓语动词，第2句may have为情态动词+动词原形作谓语动词。