Definitions Theme

How simple rhemes become simple themes

If you have followed the guide to genre, this will be familiar ground.
Here's a short example text which we will use to show the way in which themes and rhemes contribute to a cohesive paragraph:
On Monday, I have to get to the office early because I need to prepare for a meeting. This will be with two of the firm's most important clients and they are very particular and demanding. So much so that all of us, including the CEO will be there. She doesn't often attend meetings of this sort.
In what follows, we'll look at the functions of the parts which are underlined to demonstrate the relationships.

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  The first theme is the prepositional phrase (or locational Circumstance) On Monday because it the scene-setter for all that follows. It is the jumping off point for the rest of the text.
  
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  Part of the first rheme is a meeting and that becomes the theme of the next sentence, replaced by a demonstrative pronoun, this.
  
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  Part of the rheme which follows is two of the firm's most important clients which forms the theme of the next part of the compound sentence (following and), replaced by the pronoun they.
  
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  Part of that rheme is the adjective phrase particular and demanding and that, replaced by a modified pro-form with so much so, forms the theme of the next sentence.
  
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  Part of the rheme of that sentence is the CEO which forms the final theme of the last sentence, replaced by the pronoun, she.