Advanced passive constructions — Nature's Secret Alliances
Grammar: Advanced passive constructions (is said to be, is believed to have, is reported to be; imperson
Free ESL grammar exercise on advanced passive constructions themed around nature's secret alliances. Printable worksheet from classplan.ai.
What's on this worksheet
A Level 5 (advanced) ESL grammar exercise on science, practising advanced passive constructions (is said to be, is believed to have, is reported to be; imperson. The worksheet has a short reading excerpt, a grammar reference and graded practice items.
From the reading
Margulis's hypothesis was initially met with scepticism, and it is often reported that academic resistance was compounded by institutional sexism. The chloroplasts that allow plants to photosynthesise are said to descend from free-living bacteria.
Grammar
- is said / believed to
- Used to report general claims without naming a source. The discovery is said to be one of the most significant in decades.
- is believed / thought
- Refers to a belief about a past event. The species is believed to have appeared over 400 million years ago.
Sample items
- The ancient fungi ______ to have formed partnerships with plants over 400 million years ago.
- ______ widely accepted that cooperation is as fundamental to evolution as competition.
- The coral reef ecosystem ______ to be one of the most biodiverse on the planet.
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