The latest research tells us that we shouldn’t wait for young children to master the basics before targeting complex syntax. A good place to start is teaching children how to make complex sentences with subordinate conjunctions such as ‘Because’.
Volume 2 of this No Prep Pack is designed to further introduce young kids to complex sentences and to help them to understand and use ‘Because’.
Just print and jump into making more sentences with ‘Because’.
If you have more time, you can read about the research on common grammatical issues for children with language learning issues here.