Halliday & Matthiessen (2014: 523-4):
Offers and commands, and also suggestions which are simply the combination of the two (offer ‘I’ll do it’, command ‘you do it’, suggestion ‘let’s do it’), can be projected paratactically (quoted) in the same way as propositions, by means of a verbal process clause having a quoting function. For example (using an exclamation mark as an optional notational variant),
||| If we’re talking || when she’s writing up on the board, || all of a sudden she’ll turn round || and go || ‘will you be quiet!’ |||
||| she’ll go || will you be quiet |||
1 “2!
Here the verb go is the quoting verb. Further examples:
||| I said to Peter, || ‘Don’t say anything.’ |||
||| ‘The ark must be 450 feet long, 75 feet wide, and 45 feet high,’ || he said, || ‘big enough for you and your wife, your three sons, and their wives’. |||
||| He said, || ‘I could fix that hot-water heater!’ |||
||| ‘Let’s celebrate today, || because beginning tomorrow || there’s a lot of work [[to do]],’ || he said. |||