Linking words for reason and purpose

We use the following linking words to introduce a reason or purpose:   to introduce a reason: because, because of, as , since Please could you let me know by tonight because registration for the course closes tomorrow.  The supplies were late because of a transport.  As/Since I have just been made a project leader, it is important for me to attend a project leadership training course.  to introduce a purpose: to + infinitive, in order (not) to + infinitive, so as (not) to + infinitive, in order that, so (that) Could you stay later this evening to help us prepare tomorrow's presentation? I am interested in developing skills in order to deal with conflict.  We worked overtime so as not to miss the deadline.  It is vital to develop my skills in order that I can effectively motivate my team.  We worked overtime so that the project was finished on time.