inversion

Question 0

adverb required

Answer 0

à peine, aussi, du moins, rarement, toujours (only with être), vainent

Question 1

incidental clauses

Answer 1

speech or thought

Question 2

adverb inversion or que

Answer 2

combien + adverb
peut-être
sans doute

Question 3

adverb optional

Answer 3

ainsi
en vain
encore

Question 4

optional (x3)

Answer 4

relative pronouns (eg dont, ce que)
comparisons (que)
emphasis