Tenses in English grammar convey time of the action or existence that is expressed in a sentence. The word ‘tense’ is derived from the Latin word, ‘tempus’ which means ‘time’. Tense can refer to the past, present or the future from which many more tenses are formed. Each main tense can be classified into simple, continuous, perfect and perfect continuous. Additionally, tenses indicate the aspect of the action showing whether it is still going on or the action has already been completed. For example, the sentence, ‘I have sent the project report to the manager,’ shows the state denoted by the verb is completed but it is still essential since the manager has the report now. Sometimes the action or the state is in process or still continuing as in ‘he is driving.’ Moreover, it is important to follow the tense sequence in writing.