There are a few word omitted after "might" here. 2 P% P+ u0 |7 y( Q$ m5 T* o: a7 D+ }' [3 g
Imitate means "mimic", as mischievous school might (mimic) a teacher behind his/her back. $ }$ t( B: k3 e" ^5 O& e
' Q5 l1 I& c/ S! J8 k, ]$ k
I would say such usage is rather common. - I' s% y2 U% w
0 {: x6 ?) m$ v5 f# Z( F3 ?6 F7 b1 G
Pan.