I have a simple question. I'm putting something on a web site and need to know if my usage of this past participle is correct. All I am writing is the following:
Format: Instructor Led
OR, should it read:
Format: Instructor Lead
The correct form should be "Instructor Led" (or perhaps "Instructor-Led" with a hyphen).
The reason is that this phrase is actually an adjective modifying the noun "format". You can more easily imagine this if you turn the words into a sentence:
The format is instructor led. or
This course has an instructor-led format.
Because this phrase is an adjective, "led", which is the past participle form of "lead", is required because the past participle form of a verb can function as an adjective, but the bare infinitive form cannot.
I hope this is clear.
P.S. If you want a challenge, what are the "rules" for using hyphens in compound adjectives like this?