Modal verbs ( defective verbs ) ( can , could , may , might , shall , should , will , would , must , ought to )
Barbara will eat the cake
You ought to send the package by registered mail
They cannot hold the metting in that room
Will many people attend the lecture ?
You must do it right now
Nobody can measure the depth of this river
People can't take reference books home
We ought not to speak such things in public
How much will they pay you ?
They shouldn't build the resort on such a beautiful beach
We ought to clarify the problem of environment pollutiion
They may organize a new group last week
