English Grammer Tenses Exercise 1

Tenses 
The English Tense System
The links below are to lessons for each of the 12 basic tenses. In each lesson we look at two aspects of the tense:
• Structure: How do we make the tense?  • Use: When and why do we use the tense?
Some lessons look at additional aspects, and most of them finish with a quiz to check your understanding.
Present Tense I do do, I do Present Continuous Tense I am doing, I am doing tomorrow Present Perfect Tense I have done Present Perfect Continuous Tense I have been doing
Past Tense I did do, I did Past Continuous Tense I was doing Past Perfect Tense I had done Past Perfect Continuous Tense I had been doing
Future Tense I will do Future Continuous Tense I will be doing Future Perfect Tense I will have done Future Perfect Continuous Tense I will have been doing 
 Present Tense 
How do we make the Simple Present Tense? subject + auxiliary verb + main verb   do  base
There are three important exceptions:
1. For positive sentences, we do not normally use the auxiliary.  2. For the 3rd person singular (he, she, it), we add s to the main verb or es to the auxiliary.  3. For the verb to be, we do not use an auxiliary, even for questions and negatives.

Another Examples

How do we use the Simple Present Tense?
We use the simple present tense when:
• the action is general  • the action happens all the time, or habitually, in the past, present and future  • the action is not only happening now  • the statement is always true