Drill fast, then slow, then quiet, then loud. Try drilling by building up the sentence from one word until it’s complete. You can do this by repeating the phrases from your controlled practice activity in a course book or grammar book. This involves repeating the structures multiple times to help students internalise them.
One effective way to do this is through drilling.
It is essential to familiarise your students with the unique structures that follow reporting verbs so that they can confidently and accurately use them in their exams.