An incomplete understanding of verbs is an indicator of SLI:
Five-year old children with SLI sound about two years younger than they are. Listen to the way a child uses verbs. Typical errors include dropping the -s off present tense verbs and asking questions without the usual "be" or "do" verbs. For example, instead of saying "She rides the horse" the child will say "She ride the horse." Instead of saying "Does he like me?" the child will ask "He like me?" Children with SLI also have trouble communicating that an action is complete because they drop the past tense ending from verbs. They say, "She walk to my house yesterday" instead of "she walked to my house."
Now, now....Isn't this familiar?
Singaporeans face it.
we are linguistically impaired...:)