This lesson has students practice composing complex sentences for the subordinating conjunctions though, before, once, and as. In part one, students are exposed to the definitions of the conjunctions and are asked to practice composing two sentences for each conjunction. One sentence should follow the DC,IC format and the other sentence should follow the ICDC format. After practicing composing the sentences, the class can assess some student examples to determine if the sentences are being composed accurately. This is a great check for understanding before moving on to part two. In part two, students are asked to compose a paragraph and apply their knowledge of composing complex sentences, particularly with the subordinating conjunctions though, before, once, and as. Then students will highlight and label their sentences DC,IC or ICDC.