Blog about English
Using unless, provided (that), providing, as long as, in case and other alternatives to if.
English has several expressions that can introduce conditions without using if.
Common alternatives include unless, provided that, providing that, as long as, on condition that, in case, assuming, and supposing.
Unless means if not and introduces a condition that would prevent the result from happening.
For example, Unless you hurry, you will miss the train means If you do not hurry, you will miss the train.
Unless is normally used when the condition is negative in meaning, so a positive verb usually follows unless.
For example, Unless it rains, we will go out. Avoid forms such as Unless you do not hurry when the intended meaning is simply If you do not hurry.
Unless and if not can often express the same condition, but they are not always interchangeable in every context.
For example, Unless you study, you will fail can correspond to If you do not study, you will fail.
Provided that introduces a condition that must be satisfied for something else to happen or be true.
For example, You can stay here provided that you keep the room clean.
Providing that has the same basic conditional meaning as provided that.
For example, We can finish on time providing that everyone works efficiently.
As long as introduces a condition that must continue to be satisfied for the result to apply.
For example, You can borrow my car as long as you drive carefully.
So long as can express the same basic conditional meaning as as long as.
For example, You can use the room so long as you leave it clean.
On condition that introduces a condition that must be fulfilled for something to happen.
For example, They agreed to help on condition that we paid the costs.
In case introduces a precaution taken because something may happen.
For example, Take an umbrella in case it rains. The action of taking the umbrella is a precaution, not a result that depends on the rain occurring.
In case and if express different relationships between events.
If describes a condition for an event to occur, while in case describes a precaution against a possible event.
In case of is followed by a noun phrase and introduces a situation for which a precaution or procedure applies.
For example, In case of fire, use the emergency exit.
In the event that introduces a possible future situation, especially in formal or official language.
For example, In the event that the flight is cancelled, passengers will receive a refund.
Assuming that introduces a condition that the speaker accepts as a basis for considering a possible result.
For example, Assuming that everything goes according to plan, we will finish tomorrow.
Supposing can introduce a hypothetical condition and is especially common when asking someone to consider an imagined situation.
For example, Supposing you lost your passport, what would you do?
Suppose can introduce a hypothetical condition or situation for discussion.
For example, Suppose we missed the last train. What would we do?
Imagine can introduce a hypothetical situation that the speaker wants the listener to consider.
For example, Imagine you had to live without your phone for a month.
Whether or not can introduce two possible alternatives rather than a single condition.
For example, We will go whether or not it rains.
Even if introduces a condition that is not expected to change the result.
For example, I will go even if it rains.
Even if emphasizes that the result remains true despite the condition.
Compare If it rains, we may stay home with Even if it rains, we will go out.
Assuming generally presents a condition accepted as a working basis, while supposing more often invites consideration of a hypothetical situation.
For example, Assuming the figures are correct, the project is affordable. Supposing the figures are wrong, what would we do?
Provided that and as long as can both introduce necessary conditions, although as long as often emphasizes that the condition continues to be satisfied.
For example, You can stay provided that you are quiet and You can stay as long as you are quiet.
Formal and official English often uses expressions such as provided that, on condition that, and in the event that.
These forms are common in contracts, policies, instructions, and formal statements.
Conversational English commonly uses unless, as long as, suppose, supposing, and imagine.
The choice depends on whether the speaker is stating a requirement, giving a precaution, or inviting the listener to consider a hypothetical situation.
Use each alternative to if according to its specific meaning and grammatical pattern.
Common mistakes include confusing unless with if...not, using in case as a direct synonym for if, using negative clauses after unless unnecessarily, and confusing provided that with in case.