According to the grammar book, the answer to the #1 question is the adjective "happy". My problem is why not the verb "seem".
I created the #2 question to mirror the question #1. But would the answer still be "happy", or the verb "act" would seem to be the more likely answer, and why and how?
I have a lot more questions about Noun clause vs. Adjective clau
I would have called the when clauses "subordinate clauses" of time. It's hard to think of them as "modifying". If that's what they do, then they "modify" the entiremain clause I suppose. (sentential modifiers) Just my opinion. (I have no idea what your insane book might say!)
Just above your your blank response message area there should be a strip of buttons B for bolding what is highlighted. I for italicizing, U for underlining, etc. One of these is the smiley face. Click it and a panel of choices appears. Click on your choice and it will be placed in your text wherever you left the cursor last. CJ