Some conjunctions can come in the middle or at the beginning of a sentence. These are called subordinating conjunctions.
Each of these complex sentences consists of two main ideas connected with a subordinating conjunction in the middle. Click on each one to see how the conjunction can be used at the beginning of the sentence.
Although I heard a loud crash, I didn't see what happened.
Because she was struggling to get to her feet, I went to help the lady up.
Until you have completed the course of medication, you should not return to work.
When Sheila fell, I was attending to an elderly client's personal care needs.
While you are on duty, you are expected to refrain from smoking.