I have a very very very big family with 10 people.
I have a small family with (4) people.
My mother 18 years old
(your sentence)
There are many fish in the sky
(many clouds in the sky) (many fish in the ocean)
I'm mad!
I'm not mad/ I'm (happy)
The Sun is cold!
The Sun is hot. / An ice cream is cold/ Today it's cold.
I can see a big tree in the classroom.
I can see a big tree in the garden/ I can see a big desk in the classroom./ ...
I am eating a .....cat!
I am playing with a cat./ I am studying English.
My father is little (so small)
My father is big./ My dog (pen) is small
The sky is purple.
The sky is purple/ (My book/ The flower... is purple)
Stars are in trees.
Stars are in the sky.