What is sonnet and three types of sonnet?simple explanation because I have poem exam tomorrow

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

it is grammatically incorrect and is illegible to me and i can not answer it.

personal narrative

first person fiction

etc.