How do Trinitarians explain the almost exclusive use of singular pronouns to refer to God in the Bible?

In thousands of instances in the Bible, pronouns used to describe God are singular. Every instance is singular except possibly 4. These possibilities all occur in the Old Testament. For unitarians, those 4 instances are typically explained as God referring to himself and his angelic court. Two unitarian articles that put this forth are The Testimony of Singular Pronouns from OneGodWorship.com and Let Us Make Man from BiblicalUnitarian.com. As the latter article concludes, > "Understanding the “us” texts like this does not in any way damage the > massive evidence from the singular pronouns, yet it satisfactory > explains the verses in their context." How do Trinitarians explain the heavily weighted use of singular pronouns to refer to God in the Bible, if God is 3 persons?