Three Questions

[Anonymous]

Dear teachers:

1. "You'll be glad you took the class." (one student recommending a course to another student)

- I guess 'if' is dropped between 'glad' and 'you', right?
If so, my questions is if we can drop 'if' in this sentence. The verb "took" shows this should be a "subjunctive" and as long as I know, the subjunctive 'if' can't be dropped (except in inversions like "Were I you").
Is it possiblbe in spoken or informal English?

2. (a) The artist lives on his paintings.
(b) The artist lives on through his paintings.

- What's the difference between these two? In my opinion, (a) means "The artist makes his living by selling his paintings," and (b) seems "The mind of the artist still exists in his paintings."

3. "Can't take my eyes off you."

- Why sometimes peoples say, "Can't take my eyes off of you," or "Can't take my eyes off from you"?

Thank you!

[Rusty]

1. "You'll be glad you took the class." (one student recommending a course to another student)

- I guess 'if' is dropped between 'glad' and 'you', right?
(Here are the two ways you can say this:
You'll be glad if you take the class.
You'll be glad that you took the class).

2. (a) The artist lives on his paintings.
(b) The artist lives on through his paintings.

- What's the difference between these two? In my opinion, (a) means "The artist makes his living by selling his paintings," and (b) seems "The mind of the artist still exists in his paintings." (Yes, that's right. Or, the artist's name/reputation will survive him).

3. "Can't take my eyes off you."

- Why sometimes peoples say, "Can't take my eyes off of you," or "Can't take my eyes off from you"? (Off does not need of, but it is very common in American English. I have read that off of is heard less in British English. You may also hear "inside of," "outside of" while "inside" and "outside" may be preferable).