obligation and necessity : must, should, ought to , be supposed to , lack of obligation and unnecessary actions: don't need to , needn't , advice about the past: should have, ought to have, warning: had better, had better not, permission: be able to , be allowed to , be permitted to , may , prohibition: must not, couldn't, be not supposed to ,

Leaderboard

Visual style

Options

Switch template

Continue editing: ?