- He have build up his own business.
- She was studying to build up her algebra.
- He tried to build up his strength.
- The facts added together to build up an indisputable theory.
- The French lords eagerly embrace the system that splits the country up into smaller provinces, duchies and fiefdoms, actively building up their forces to ensure their own security and power.
- Gradually they will build up a varied, well-balanced vocabulary.