<Li> Offer or promise </Li> <Dl> <Dd> <Dl> <Dd> If you wash the dishes, I'll vacuum the floor . </Dd> </Dl> </Dd> </Dl> <Dd> <Dl> <Dd> If you wash the dishes, I'll vacuum the floor . </Dd> </Dl> </Dd> <Dl> <Dd> If you wash the dishes, I'll vacuum the floor . </Dd> </Dl>

When indirectness or tact is desired it may be desirable to use