Present Continuous Tense

The Present Continuous Tense is used to express an action that is going on at the moment.

Examples:
1. I am reading a book in the library.
2. The old man is sitting on the bench.
3. They are fishing by the river.
4. The guard is closing the door now.
5. The pupils are arranging the desks in the classroom.

Notes
* The present continuous tense is formed as 
    am / is / are + [ verb + -ing ]

* For verbs that end in 'e' , replace the 'e' with 'ing'.
   Examples: (a) arrive + ing = arriving
                     (b) receive + ing = receiving
                     (c) come + ing = coming

* For verbs ending with a consonant and have only the one vowel before the consonant, double the last letter before adding ' ing '.
   Examples: (a) fit + ing = fitting
                     (b) dig + ing = digging
                     (c) rob + ing = robbing