Writing essay in English should have Knowledge of grammar. The most of student use tense grammar is correct and the result is teacher can’t understand and bad point .In my opinion , writing essay should to know basic of grammar because it easy to write an easy and other people can understand .The student can study English fiction that have several level of vocabulary . Generally students can drill exercise of grammar book or drill often to write dairy. If students know grammar, the students might write an essay easy and better