Halliday & Matthiessen (2014: 525):
The finites are declarative, usually modulated with a modal auxiliary of obligation (should, ought to, must, has to, is to, might, could, would) serving as Finite, e.g.
||| The doctor ordered || that all the books and toys [[that the Boy had played with in bed]] must be burned. |||
||| Yet somebody told me || that I mustn’t repudiate my non-fiction, || because it’s saying very much || what the fiction is saying. |||
||| He told Philip || that he should demand higher wages, || for notwithstanding the difficult work [[he was now engaged in]], he received no more than the six shillings a week [[with which he started]]. |||
||| I wish || you’d do something about that wall, Jane. |||
||| But until you’ve got kids || and are bringing them up ||| ... I wish || mine would hurry up || and grow up || and leave home. |||