Connectors and linkers: reason, result and purpose

To join elements within a sentence or sentences within a text we use conjunctions,
prepositions, adverbs and adverbial expressions called “connectors” or “linkers”.

because
Because explains the motive, the cause.
He didn’t go out because he was very busy.
as / since (conjuction placed at the beginning of the period of time)
As he couldn’t find a job, he enrolled on a web-design course.
Since we had spent all our money, we couldn’t even buy a little souvenir.

so
So explains what the result is, the consequence.
We woke up late, so we missed our bus.
therefore, as a result / consequently, for this reason
He’s broken his leg, therefore he won’t be able to play in the next match.
These are more formal ways to express a result.
The bus drivers are on the strike today. As a result, the trafic in the city has doubled.

so .... + adjective / adverb + that
The pudding was so nice that everyone asked for a second helping.
so as to .... / not to ....
The teacher spoke for such a long time no one was listening in the end.
Speak softly so as not to disturb them.
such a + adjective + noun + that
Note the use of the intesifying adverbs so and such in exclamatory expressions.
So + adjective or adverb
Such a .... + adjective+ noun
Kemal is so cute! And he is such a smart child, too!

to / in order to (+ base form of verb)
They express the purpose or the aim of an action. In order to ... has a more formal use.
He’s qualifying to become an accountant. (not: .... for become an accountant)
He has taken a course in business administration in order to gain career advancement.
so that
So that introduces a clause that usually contains a modal: will / would, can / could, or
may / might.
So that we can / may win, we’ll have to train really hard.
I’ll use microphone so that everybody can hear.