1.
C1 : I suggest that he use cloth bag to wrap food.
C2 : I suggest he shouldn't use plastic bag to wrap food.
2.
C1 : I suggest she should turn off the light when going to beg.
C2: I suggest turning off the light when she going to beg,
3.
C1 : I suggest calling the plumber because there are many cracks in the pipes
C2.
4.
C1 : I suggest turning off the gas when going out.
C2 : I suggest that we should turn off the gas when going out,
5.
C1 : I suggest using bikes instead of motorbikes.
C2 : I suggest that we should use bikes instead of motorbikes.