Common Core Standards
Grade 5
Language L.5.1.B
Form and use the perfect (e.g., I had walked; I have walked; I will have walked) verb tenses.
They don't have to be perfect in their use of the perfect tense (eh? eh?), but your students should have a baseline understanding of it before they graduate to the sixth grade. This entails both a conceptual understanding of the tense and its forms, as well as its use in practice.