Other words and expressions with similar uses

Many words and expressions can be used in similar ways to if, and often with similar structures. Some of the commonest are imagine (that), suppose (that), supposing (that) (used to talk about what might happen), and providing (that), provided (that), as/so long as, on condition (that) (used to make conditions).

• Imagine we could all fly. Wouldn’t that be fun!
• Supposing you’d missed the train. What would you have done?
• You can borrow my bike providing/provided you bring it back.
• I’ll give you the day off on condition that you work on Saturday morning.
• You’re welcome to stay with us as/so long as you share the expenses.

note

For suggestions with suppose, supposing and what if, (see here).