Punctuation marks are:
. , ? ! ... ; :

No matter what kind of punctuation mark it is. Punctuation marks always go with the last word and cannot be separated. Punctuation marks are separated from the words after.

Wrong
Apples grow on trees.They are fruits.
Apples grow on trees .They are fruits.
Apples grow on trees . They are fruits.
Apples grow on trees
.They are fruits.

Right
Apples grow on trees. They are fruits.

Apples grow on trees.
They are fruits.

If punctuation marks are NOT set in correct order, they will be definitely counted as mistakes in English.