The document discusses different conjunctions and phrases used to indicate reasons, contrast, and purpose in sentences. For reasons, it lists conjunctions like "because", "as", and "owing to" that are used to provide an explanation or cause for something. For contrast, it gives conjunctions like "although", "even though", and "however" to show a difference or exception. And for purpose, it identifies phrases like "in order to", "to", and "so as to" that are used to indicate an intended aim or objective.

1. 1. REASONS
 Because (of), as, since, due to, owing to
 The company website failed because visitors found it too difficult to
navigate.
 The first fire occurred on a weekend. As/Since the office was empty
at the time, there were no injuries.
 The car was recalled because of a design fault in its braking system.
 Owing to/Due to the recession, most retailers have recorded a sharp
downturn in quarterly profits.

2. 2. CONTRAST
Although, even though, though, however, nonetheless,
neverthless
*Although/Even though the company has expanded, it hasn’t yet
increased its profit margin.
* The company hasn’t yet increased its profit margin,
althougheven though it has expanded.
* The company has expanded. However/nonetheless/neverthless, it
hasn’t yet increased its profit margin.

3. 2. CONTRAST
In spite of, despite +NOUN
*Despite the evidence presented by expert scientists, some
commentators still question the existence of global warming.

4. 3. PURPOSE
In order to to so as to
*The new government should take new precautions in order to to so
as to prevent the violence to women.