Unsolved Mysteries
Grammar
Subject + Modal Verb + Have + Past Participle Verb (V3)
It must have been…
We can use this structure to speculate (guess) about things that happened in the past.
Stonehenge must have been used as a calendar.
Bigfoot could have been a man in a costume.
The Lock Ness monster might have already died!
The cave paintings may have been made to express art.
Vocabulary
- To speculate (6:56) – To guess, assume
- Sceptical (12:59) – Being unsure about whether something is true, doubting
- Shrouded (14:40) – Covered by, hidden (a mountain shrouded in fog)
- Mural (19:55) – A painting on a wall
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