Student or Learner
What is the grammar in this sentence? Does it use the inversion?
It takes the place of "high."
Passions are high - they are dangerously high.
Did the line move slowly?
Yes, agonizingly so. -- The line moved agonizingly slowly.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.