Dramatic irony
Birling’s speeches, Mrs Birling’s witless implication of Eric
Stage directions
“pink and intimate then brighter and harder” when inspector comes into the play
tension
builds up throughout the play ; interrogation of characters, personal relationships
foreshadowing
symbolism (titanic) , Mr Birling “knightwood”, war
time-lapse
set in 1912 written in 1945; audience is in priviledged position
4th wall
the inspectors final speech addressed directly to audience