Conditional alternatives emphasizing conditions and requirements
Result clause + provided (that)/as long as + condition
Result clause + provided (that)/as long as + negative condition
Can I go, as long as I'm back by ten?
💡 'That' is optional after 'provided'. All these expressions emphasize the condition more than simple 'if'.
✓You can stay as long as you're quiet.
✗You can stay as long as you will be quiet.
Use present tense for future meaning after 'as long as'.
✓Provided that the weather is good, we'll have a picnic.
✗Provided that the weather will be good, we'll have a picnic.
Present tense in the condition clause, not future.
✓I'll lend you money on condition that you pay me back.
✗I'll lend you money on condition that you will pay me back.
Present tense after conditional expressions.