10.29 focusing on the topic

Clauses with 'what' as their subject can be used to focus on the thing you are talking about. They can be put after the verb 'be' as well as in front of it. For example, you can say 'Its originality was what appealed to me', as well as 'What appealed to me was its originality'.

• What impressed me most was their sincerity.
• These six factors are what constitutes intelligence.