That is part of the reason why I think SEE should be used especially during English class when grammar and spelling is involved.
There are a lot of ASL signs that are confusing since they don't always emphasize extras such as plural, possession, etc.
Oh, I totally agree! I've taught English for five years and I found that SEE certainly has its place in my room. I'm so thankful I took the time to learn how to sign SEE II. It came in handy.
It is possible to use ASL to emphasize English rules. For example, let's use the word "jump."
Jump = sign "jump" briefly
jumping = sign "jump" in a continuous manner (like several times, but almost in a circular manner...wish I could do a video to show what I'm talking about!)
jumped = sign "jump" "finished"
After we get this part down, then we discussed the verbs: is/are; was/were; etc. The students will learn which verb is used for singular and plural nouns. That's when we go back to using the ASL format and the students will use structured sentence patterns and watch me sign in ASL: girls three jump finished. They would write: The three girls jumped. If we've managed to talk about the has/had/have verbs, then the sentence pattern will allow the correct one in the sentence.
It is very grueling work to teach d/hh kids English.
I used the Multisensory Grammar method by Suzanne (last name ???) to teach the grits of English grammar...which is using colors, among other visual and hands-on manipulatives for students to grasp understanding of the syntax. I also used Step-Up-To-Writing for the paragraph format and essay style writing. It incorporates colors, pictures, and graphic organziers to help the writing organization process. And for sentence starters or for students who are significantly behind with sentence construction, I pulled out the Fiterzald (not sure of the spelling) Key method.
The students responded VERY well. Of course, it is not fool-proof and there are other things I try to do was well
Bottom line is - there are more ways to teach English than using specific signs; you can use colors, manipulatives, graphic organizers, pictures, drama, etc. to teach the concepts. This is also important because of the different learning styles that the students have.
I know as an interpreter you may not be able to do all of these things but perhaps if there were additional support (such as some of the things I mentioned above) then the student(s) may be able to catch on or have something concrete to use for referencing and understanding.