Question 1

Why does "the car needs washing" mean "needs to be washed"?

Accepted Answer

When an object (not a person) is the subject of "need" + gerund, English creates a passive meaning automatically. The car cannot wash itself, so "needs washing" must mean "needs to be washed by someone." This construction developed because it is shorter and more natural than the full passive. Native speakers say "Your hair needs cutting" far more often than "Your hair needs to be cut." Both are correct, but the gerund form is preferred in everyday conversation. This passive gerund pattern only works with "need," "require," "deserve," and "want" — other verbs do not have this special meaning.

Question 2

Can I use "want" with this passive gerund pattern?

Accepted Answer

Yes, "want" can work the same way, but it sounds more informal or old-fashioned: "The dog wants feeding" (= wants to be fed). This usage is common in British English and some regional dialects. However, "The dog needs feeding" is more standard in modern English. With "want," the infinitive is usually preferred: "I want to feed the dog" or even "The dog wants to be fed." Cambridge exams rarely test "want" with passive gerund meaning, so focus on "need," "require," and "deserve" for exam preparation. These three verbs are the most reliably tested.

Question 3

How do I know when to use gerund or infinitive after "need"?

Accepted Answer

Look at the subject. If the subject is a person who will do the action, use an infinitive: "I need to finish this report" (I am the person who will finish it). If the subject is a thing that will receive the action, use a gerund with passive meaning: "This report needs finishing" (someone must finish the report — the report receives the action). The test is simple: can the subject do the action? A person can finish a report (use infinitive), but a report cannot finish itself (use gerund for passive meaning). This subject test works reliably for all examples you will encounter in exams.

Gerunds and Infinitives: Need and Want (Passive Meaning)

Quick Rule

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