Sign up

When you want to join an organized activity or offer your help, use the phrasal verb sign up. Signing up simply records your intention to join a group, attend an event, or perform a specific duty. It does not mean you have already attended the meeting, paid any required entrance fee, or written your physical signature on paper. You can sign up through an online website, by writing your name on a paper list, or by asking a coordinator to add you. In everyday spoken and written English, sign up is the natural choice, whereas register is a more formal alternative used on legal documents or university enrollment forms. When both speakers already know the activity being discussed, you can use sign up on its own without naming the event again, as in the question: Where do I sign up?

When the words directly after the verb name an event, group, or service, use the preposition for followed by a noun phrase. A noun phrase is a group of words built around a noun, such as a gardening session, a weekly newsletter, or evening classes. For example, if your community garden hosts a weekend planting workshop, you say that you sign up for the workshop. In standard American English, for is the default preposition before any organized event or subscription. In British English and certain service agreements, people sometimes say sign up to a service, but choosing sign up for an activity remains the most reliable pattern across all varieties of English.

This also comes up in Repair inspection fee and quote and Break up.

When you agree to perform a specific job or volunteer task, use the preposition to followed by a base verb. A base verb is the plain dictionary form of an action, such as water, weed, build, or help. For instance, you sign up to water the plants on Monday morning. Notice a useful distinction that often confuses learners: saying sign up to help means you are volunteering your own effort to assist others. In contrast, saying sign up for help means you are registering to receive assistance because you need support. In connected speech, both to and for typically have weak vowel sounds, so you must rely on whether an action verb or a noun follows rather than listening for strong stress.

When you register someone other than yourself, the placement of words depends on whether you use a full noun or a personal pronoun. With a full noun phrase, you have two choices: you can say sign up your neighbor or sign your neighbor up. Both orders are completely natural. However, when you replace the person's name with an object pronoun such as me, him, her, us, or them, the pronoun must go between the verb sign and the particle up. You can say sign them up, but you must never say sign up them. This rule also explains the common informal expression Sign me up, which enthusiastically tells someone that you want to join an activity.

Spelling depends entirely on how the word functions in your sentence. When you describe the action of registering, the verb is always written as two separate words without a hyphen: sign up. When the word acts as a compound noun referring to the registration itself, write it with a hyphen: a sign-up. Similarly, when it appears before a noun as an adjective, use a hyphen, as in a sign-up sheet or the sign-up deadline. In modern software and web interfaces, you will frequently see signup written as a single solid word for buttons or account titles. Even so, signup or sign-up should never be used as a verb in written English.

The phrasal verb changes across different grammatical tenses using its core paradigm forms: the base form sign up, the third-person singular present signs up, the past simple signed up, and the continuous participle signing up. For instance, a regular volunteer signs up whenever a new schedule is posted. When forming questions and negative statements in the past simple tense, remember that the auxiliary verb did or didn't already expresses the past time. For this reason, the main verb must remain in its base form: Did you sign up? or I didn't sign up. Saying Did you signed up is a frequent error that combines two past forms unnecessarily. Learners must also avoid confusing sign up with sign in. Signing up creates a new membership or account for the first time. In contrast, signing in or logging in provides access to an account that you previously created. When listening, note that the letter g in sign is silent, making the word sound like sine, and the final n links smoothly into up.

To build reliable listening comprehension, practice tracking whether the speaker follows the phrasal verb with an activity or an action verb. In spoken conversations, speakers link the final consonant of sign into up, producing a smooth flow that sounds like sigh-nup. In the past form signed up, the d is pronounced softly without adding an extra syllable. When listening to rapid speech, follow three progressive steps: first identify whether the speaker names an event or a physical action, next listen for the phrase boundary around for or to, and finally verify your understanding against the written transcript. For additional practice with membership dialogues, explore /micro-listenings/9-2/.

Before writing or speaking, make your language decision by checking what follows the phrasal verb. If an activity, service, or group follows, choose sign up for. If a plain action verb follows, choose sign up to. If you are registering another person using a pronoun, place the pronoun in the middle: sign them up. Repair errors immediately by checking for common slips, such as using signed after did, confusing sign up for help with sign up to help, or adding hyphens to the verb. When describing upcoming volunteer commitments, combine these patterns with your knowledge of future arrangements at /grammar/future-plans/.