Steven and Jai

[jai]

Simple:
1. I have many friends.
2. I have absolutely zero friends.
Compound:
1. The dog bit my leg, and I fell down the stairs.
2. I wanted to tell her, but I was too scared.
Complex:
1. My dog after being stepped on barked.
2. Many people after the sad movie cried.
Compound-Complex:
1. While going to the mall, and after seeing the soft pretzels, I was hungry.
2. After sitting in the dark, and finding the razor, I slit my throat.

[Mr. Wells]

Simple:
1. I have many friends.
2. I have absolutely zero friends.
CORRECT

Compound:
1. The dog bit my leg, and I fell down the stairs.
2. I wanted to tell her, but I was too scared.
CORRECT

Complex:
1. My dog, after being stepped on, barked.
2. Many people cried after the sad movie. Both INCORRECT

Compound-Complex:
1. While going to the mall, and after seeing the soft pretzels, I was hungry. INCORRECT

2. After sitting in the dark, and finding the razor, I slit my throat.
INCORRECT

[jai]

Simple:
1. I have many friends.
2. I have absolutely zero friends.
Compound:
1. The dog bit my leg, and I fell down the stairs.
2. I wanted to tell her, but I was too scared.
Complex:
1. My dog, after being stepped on, barked.
2. Many people, during the movie, cried after the hero's death.
Compound-Complex:
1. While going to the mall, John ate french fries, and everyone else had bagles
2. After sitting in the dark, my mother walked in, and she ate in front of my face

[Mr. Wells]

Simple:
1. I have many friends.
2. I have absolutely zero friends.
Compound:
1. The dog bit my leg, and I fell down the stairs.
2. I wanted to tell her, but I was too scared.

Complex:
1. My dog, after being stepped on, barked. INCORRECT
2. Many people, during the movie, cried after the hero's death. INCORRECT

Compound-Complex:
1. While going to the mall, John ate french fries, and everyone else had bagles
2. After sitting in the dark, my mother walked in, and she ate in front of my face.

CORRECT

[xxstevensimxx]

Simple:
1. I have many friends.
2. I have absolutely zero friends.
Compound:
1. The dog bit my leg, and I fell down the stairs.
2. I wanted to tell her, but I was too scared.

Complex:
1. My dog, after being hit by a car, whimpered loudly.
2. Many people, after protesting the new cause, sought a different way to portray their message.

Compound-Complex:
1. While going to the mall, John ate french fries, and everyone else had bagles
2. After sitting in the dark, my mother walked in, and she ate in front of my face.

[Mr. Wells]

Your complex sentences contain only one clause.