I don't know about you, but getting my students to use sentences is quite difficult. For our state testing, there are multiple tasks that require my students to "generate a sentence". Yikes! I know my kiddos get the concept and I can get them to show me this in multiple ways, but generating a sentence is not currently one of them!
We have been working on this skill in multiple ways. The most successful one I've had is to use a sentence creation graphic organizer.
We began with one that was filled in with a word bank that I knew included the words needed for the pictures or situations we were addressing.