The document defines gerunds as verbs ending in "-ing" that function as nouns. It lists prepositions and notes they are always followed by a noun or pronoun. Examples are given of sentences using gerunds after prepositions like "after", "before", and "of". Finally, incomplete sentences are provided to practice filling in gerunds after prepositions like "of", "with", and "in".

2.  The gerund is the -ing form of the verb when it is used as a noun.

3.  A preposition is a word that shows relationship between a noun and
some other word in a sentence. A preposition is always followed by
an object, either a noun, and a pronoun.

4. about above across after against
along behind below beneath beside
besides
betwee
n
down during except
for from in off on
onto
opposit
e
out outside till
to toward under underneath until
with within without

5. EXAMPLE:
Driving a car is not easy at all!
Running keeps you in shape.
Smoking is not good for your health.

6. EXAMPLE:
We use gerunds when the verb is immediately after a preposition
 I went to the park after going to school.
I will call you before arriving at the office.
I am thinking of buying a new car.

7. I am afraid of __________ an airplane (fly).
She is bored with __________ ( cook).
__________ (do) excersice keeps you in good shape.
The teacher is interested in __________ (solve) Engish problems.
__________ (work) all day makes me feel tired.
Not (participate) __________ in class will low my grades.