Each ASL sign can be broken down and analyzed into five separate features called Parameters. For a single sign to be correct, each of the five parameters must be correct.
Mouth morphemes in ASL
http://editora-arara-azul.com.br/ebooks/catalogo/3.pdf
MOUTH MOVEMENT / DESCRIPTION / EXAMPLE:
CHA / big (height, length, size) / MOTHER WANT COFFEE LARGE
TH / clumsy, lousy
Puffed Cheeks / very fat, long ago, many / POINT JAPAN SUMO WRESTLER WOW FAT
Clenched teeth / very many, huge, smart, sexual climax, dark, dangerous / BELT (DARK) BROWN
Tongue out & down / not-yet, ugh, accident, lousy, erratic, hungry, exaggerate / TEACHER NOT-YET COME CLASS
STA-STA / struggle, long process
Pursed lips / work hard, read carefully, sorry, hearing person, persevere, secret
Pursed lips with twiggled nose / characteristic, the way it is
Puckered up lips (mmm) / write, drive, read, curious, medium-sized, comfortable / POINT SOFA COMFORTABLE
Puckered up lips with “AWFUL” sign / interesting, wow
FOR-FOR / what for, why, how come / I SIT TTY YOU COME BOTHER FOR FOR?
PAH / finally, big success
POWOO (Pow-oo) / stricken, forget, boom
WATT / don’t want, want / MY WIFE DON’T-WANT EAT FISH
SOO tired, cold, dirty, delicious, good riddance, curious, close call
SOW / very cold, very tired, very hard, very embarrassed
FISH / finish, stop it / MY HOMEWORK FINISH
PUTT / tend, give in
POW / explode, hit hard, trigger a gun, repress, hot temper
SHH / use exceedingly, make out, poke fun, wild time
MUM-MUM / win an unbroken series of games, nab many suspects
FK / skip work, ignore
PS-PS / fancy, chic
Topic/Comment || Tense With Time || Simple Yes/No || Long Yes/No || Information Seeking || Pronominalization || Rhetorical || Ordering of Simple Sentences || Conditional || Negation
Just like most other languages, American Sign Language has a set of rules that it follows when being signed. You will be tested various times on your knowledge of the rules, as they are key to learning true ASL. A tool you can use to remember the rules is "TRIPSTONCL", you've probably heard about it in class, and it goes like this:
Below are the definitions of each grammatical rule, and an example of each written in English Gloss (and then put into English).
Topic/Comment - In a simple topic/comment sentence, the topic is described first, followed by the comment.
Example: HER MONEY LOST, SHE UPSET
English: She's upset that she lost her money
The topic was described first (her money was lost) and then the comment followed (she was upset).
Tense with Time - The time sign is placed at the beginning or near the beginning of a sentences.
Example: YESTERDAY, ME STAY HOME
English: I stayed home yesterday.
The time sign was "yesterday" and was located near the beginning of the sentence.
Simple Yes/No - Short sentences that ask a yes/no question. The order of the signs varies.
Example: EXERCISE YOU WANT YOU? with eyebrows raised
English: Do you want to exercise?
The sentence given was short and the answer would be a yes or a no; the order of the signs could be moved around as well and mean the same thing.
Long Yes/No - Long yes/no questions, sometimes they use a topic/comment format.
Example: CAT BLACK TREE CLIMB, YOUR? with eyebrows raised
English: Is that black cat climbing the tree yours?
The question was longer than that of a simple yes/no; the topic was described before the comment (which was the "your" part).
Information Seeking - Simple questions that ask for information. They can have variable sentence structures, and rely sometimes on non-manual signals to distinguish them from a declarative sentence.
Example: OLD++ YOU? with eyebrows squeezed
English: How old are you?
The question was short and simple, the sentence structure doesn't really have much to change though. Normally, non-manuals would be used in all three question situations.
Pronominalization - Pronouns are indicated by pointing to either a person or thing that is present, or a place in the signing space that is used as a referent point for a person or thing. Pointing is mostly done with the index finger, but eye gazing and other handshapes are sometimes used.
Example: MY BROTHER VISIT-ME
English: My brother is visiting me.
In this case, the pronominalization was when "he" was used; you could either be pointing at the brother or a spot in your signing space to refer to as "he".
Rhetorical - In a rhetorical question, the signer asks a question and then answers it.
Example: ME KNOW ASL? YES.
English: I know ASL.
The signer asked his or her question, and then answered it; by doing so, we knew he or she knows ASL.
Ordering of Simple Sentences - In simple sentences, the verb can be placed before or after the object of the sentence.
Example: GAME ME PLAY
English: I'm playing a game.
The sentence was short and simple, and we were allowed to move around the verb and not have it change the sentence.
Conditional - In a conditional sentence, the condition is described first, then the outcome of the condition is described.
Example: SUPPOSE SHE SEE ME, ME HAVE-TO LEAVE
English: I will have to leave if she sees me.
In most conditional statements, the word "suppose" is used; the condition was said first (suppose she sees me), and then the outcome came afterward (I'll have to leave).
Negation - You can negate a thought by placing a negative sign before the verb or by first describing a topic and then signing the appropriate negative sign, or by giving a negative head shake.
Example: ME NOT WATCH FOOTBALL GAME.
English: I'm not watching the football game.
In this case, the word "not" was the negation portion of the sentence, making the sentence negative.