TOEIC Link Part 5 — In Case vs In the Event That vs Should: Contingency Clause Selection

____ the shipment is delayed, the client will be notified immediately. The options are In the event that, In case, Should, and In case of. Every option gestures at the same situation — a delay that might occur — so learners who read for meaning alone find three answers that all "feel right." The exam is not testing whether you understand the possibility; it is testing whether the connector matches the grammar that follows it and the register the sentence needs. This guide separates the three contingency connectors Part 5 swaps most often so the choice comes from structure, not from the shared sense of "if this happens."

Three ways to mark a possible condition — and what each one attaches to

All three connectors introduce a situation that may or may not happen, but they plug into different structures:

in case + full clause = as a precaution against (something might happen, so act now)

in the event that + full clause = if (formal conditional conjunction)

should + subject + base verb = if (inverted conditional, no if word)

Read the skeletons:

• Keep a copy **in case** the file is lost. — you act now (keep a copy) to prepare for a possible future problem.
• **In the event that** the file is lost, contact IT. — a plain formal if; the main clause states what to do.
• **Should** the file be lost, contact IT. — identical meaning to the line above, but if is deleted and should moves to the front with the base verb be.

The trap is that in case and in the event that are not interchangeable even though both take a full clause. In case carries the extra sense of precaution — do X now so that a later problem is covered. In the event that is a neutral conditional: it does not imply you are acting in advance, only that if the condition holds, the main clause applies.

Why the structure after the blank decides the answer

The fastest way to eliminate distractors is to look at what comes immediately after the blank.

• If a full subject + finite verb follows (the shipment is delayed), then In the event that, In case, and (with different word order) the plain if are all grammatically possible — so you decide on meaning and register.
• If the verb is in base form with the subject after a fronted should (the shipment be delayed), only Should fits, because inversion requires it.
• If a noun phrase, not a clause, follows (____ a delay), then In case of or In the event of is required — the that/plain-clause forms are ungrammatical before a bare noun.

That last point is the single most common Part 5 contingency trap. Compare:

• **In the event that** the shipment is delayed, ... — clause follows, so the that form is correct.
• **In the event of** a delay, ... — noun phrase follows, so the of form is correct.
• **In the event that** a delay, ... — wrong; a bare noun cannot follow that.

So before choosing on meaning, confirm whether a clause or a noun phrase follows the blank. This same clause-versus-phrase split governs other preposition-conjunction pairs, and the diagnostic is identical to the one drilled in despite versus although preposition-conjunction selection: if the head is followed by a full clause, you need the conjunction form; if it is followed by a noun, you need the preposition form.

Should-inversion is the answer when if has disappeared

When the sentence reads ____ any questions arise, please contact the coordinator, look for the missing if. There is no if word, the subject any questions is followed by the base verb arise, and the front of the clause is empty. Only Should produces a grammatical inverted conditional here:

• **Should** any questions arise, please contact the coordinator. = If any questions arise, ...

This inverted form is more formal than the plain if conditional, which is exactly why business-register Part 5 items favor it. If the option list offers both a plain-clause conditional and Should, and the verb after the subject is in base form, the inversion is your signal that Should is the intended answer. The register logic here overlaps with the formal-connector choices covered in owing to versus due to versus on account of cause-preposition selection, where the exam again rewards the connector that matches a formal written clause rather than a casual synonym.

Reading the distractor logic on paired-fact workplace items

Part 5 contingency items usually pit a precaution reading against a neutral conditional reading, then add a structure trap. Work the item in this order:

1. Check what follows the blank — a full clause, a noun phrase, or a fronted base verb. This kills at least one distractor immediately.
2. If a clause follows, decide precaution vs neutral condition. Does the main clause describe acting in advance (keep a copy, bring an umbrella, save early)? Choose in case. Does it describe what to do if the condition holds? Choose in the event that.
3. If the verb is base-form with no if, choose Should. The inversion is only compatible with that one connector.

Worked example: Save your work frequently ____ the system crashes during the update. The main clause (save frequently) is an action taken now, as a safeguard against a possible later crash. That precaution meaning selects in case over in the event that, even though both are grammatical after the clause. The exam counts on you defaulting to the more formal-looking in the event that; the precaution logic is the deciding factor.

Quick-reference decision table

Fix the choice on the structure after the blank first, then on precaution-versus-condition, and the shared idea of "something might happen" stops being a trap. For more Part 5 connector contrasts built on the same clause-versus-phrase diagnostic, work through the despite versus although preposition-conjunction selection guide next.