1. To talk about purpose, Arthur uses the words in order to + infinitive. This means the same as to + infinitive, but it is stronger and sounds more serious. 2. To talk about purpose, you can also use so that. You can leave out the word that if you wish (“...so you can get tax back...”). 3. Arthur uses the phrase for
business purposes. You can also say for leisure purposes, for holiday purposes, etc. 4. So as to means the same as in order to. We often use it to talk about the advantage of doing something. 5. This is another example of so that, this time, with a change of subject (“An offshore fund..., so that you...”). 6. The negative of so as to is
so as not to. Here, it is used in the context of “so that we don’t waste time”. 7. Arthur uses the phrase for + noun / pronoun + to
(= ...so that you can sign...).