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Using verbs correctly involves knowing more than just how to express action in a sentence. This lesson will show you a few special types of verb forms – infinitives, present participles, and past participles – as well as how to use them.

Verb Forms

When we remember the days when we first learned about grammar, we tend to think about a few of the basic parts of speech, like nouns, verbs, and adjectives, and we may kind of think that as long as we know what those words mean, then we basically know all that we need to know.The rules of grammar can get a bit more complicated than that, though.

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But there’s good news: it takes just a bit of studying to understand the more specific forms of various parts of speech and how to use them. Today we’ll explore the exciting world of verb forms.

Infinitives

You may recall that a verb is a word that expresses an action or occurrence. There are a few different types of verb forms that you’ll want to be able to identify and use correctly in sentences. One type of verb form is the infinitive, which consists of the word ‘to’ plus the base form of a verb. You can think of an infinitive as kind of the raw form of a verb that hasn’t been conjugated, paired up with a subject or assigned a verb tense.

Examples of infinitives include:

  • to run
  • to go
  • to worry
  • to be
  • to drive

An infinitive phrase consists of an infinitive plus any additional words that describe the action expressed by the infinitive. For example, the phrase ‘to get up early tomorrow’ is an infinitive phrase. Another example is ‘to get a new job.’One important thing to remember about infinitives is that you can’t have an infinitive phrase hanging out by itself, as it would be a sentence fragment, or incomplete sentence. That makes sense because if you were to announce, ‘To get a new job!’ or ‘To get up early tomorrow!’ and then run off, you’d leave people confused by your incomplete idea.Because an infinitive is a sort of raw form of a verb, that means that we would have to do something to an infinitive for it to function as the main verb in a sentence, or that we would have to use the infinitive in some other way – not as the main verb.

Take the infinitive ‘to conquer,’ for example. As I mentioned, it wouldn’t work to use this raw form as a main verb in a sentence. I wouldn’t say, ‘Jane finally to conquer her fear of kittens.’ I could, however, use the past tense form of the verb and say, ‘Jane finally conquered her fear of kittens.’I could also say, ‘Joe conquers cockroaches for a living,’ or ‘Sandy will conquer her math test on Friday.’ In these sentences, I haven’t used the infinitive raw form ‘to conquer.’ Instead, I’ve used forms of it as main verbs, and I’ve made sure that my subjects agree with my verbs and that I’ve used the right verb tense each time.

Keep in mind that you can use infinitives in sentences. You just can’t use them as main verbs. For example, I could use an infinitive as the subject of a sentence: ‘To study grammar is the best possible thing one can do.

‘ In this sentence, the complete subject is the infinitive phrase ‘to study grammar,’ and the verb is ‘is.’

Present Participles

Another type of verb form that has a few special rules for usage in sentences is the participle. There are two types of participles. A present participle is a verb form that ends with -ing. Present participles are often used as adjectives. You may recall that an adjective is a word that describes a noun or pronoun.

An example of a present participle is the word ‘sleeping.’ Here’s how it would be used as an adjective in a sentence: ‘The sleeping dog twitched its tail.’ Here, the present participle ‘sleeping’ describes the noun ‘dog.

‘Present participles can be used as verbs, but they aren’t complete verbs when used by themselves. Just as with infinitives, you can’t use a present participle as the main verb by itself in a sentence. You’d need to add something to it. For example, you wouldn’t say, ‘Jamal studying for his test.’ This is technically an incomplete sentence, or sentence fragment.

You’d need to add something to the present participle ‘studying.’ In this case, you would add a helping verb – a form of the verb ‘to be.’ A corrected version of this sentence would be ‘Jamal is studying for his test.’

Past Participles

There’s a second type of participle, and the rules are somewhat similar. A past participle is a verb form that usually ends with -ed or -d.

Some verbs, called irregular verbs, don’t follow the typical patterns that most verbs do. Irregular verbs have past participles with a variety of endings that don’t necessarily follow a set pattern. That’s because irregular verbs are – you guessed it – irregular. Many past participles end with -t, -en, -n or -ne, though that’s not a complete list.Some examples of irregular verbs are:

  • choose
  • fall
  • fly
  • ring

Past participles of regular verbs look like the past tense version of the same verbs.

For example, both the past tense and the past participle of the verb ‘to look’ is ‘looked.’ Some irregular verbs are exceptions to this rule; their past participles are different from their past tense verb forms. Note that the past tense of ‘choose’ is ‘chose,’ while the past participle is ‘chosen.’ The past tense of ‘fall’ is ‘fell,’ while the past participle is ‘fallen.’ The past tense of ‘fly’ is ‘flew,’ while the past participle is ‘flown.’ The past tense of ‘ring’ is ‘rang,’ while the past participle is ‘rung.

‘Past participles, just like present participles, can be used as adjectives. For example, we could use the past participle ’embarrassed’ as an adjective like this: ‘The embarrassed student grabbed her papers and ran from the room.’ Here, the past participle ’embarrassed’ describes the noun ‘student.’ Another example of a past participle is ‘broken.’ We could use it as an adjective like this: ‘The children tried to hide the broken lamp.’Past participles aren’t just used as adjectives, though. When paired with a helping verb – helping verbs include forms of the verbs ‘to be’ and ‘to have’ – a verb’s past participle will become part of the past perfect or present perfect tense of a verb.

For example, the past tense of the regular verb ‘to walk’ is ‘walked,’ so the past participle is also ‘walked.’ We can pair the past participle with a helping verb to form two different verb tenses. An example of using the past perfect tense would be ‘I had walked all the way to the store before it started raining.’ An example of the present perfect tense would be ‘I have already walked two miles today.

‘You don’t have to get too caught up with the various types of perfect tenses for the purposes of this lesson. At this point, just know that in addition to acting as adjectives, past participles can also help form a couple of types of verb tenses.

Lesson Summary

Remember that a verb is a word that expresses an action or occurrence. There are a few types of verb forms that you should be familiar with.One type of verb form is the infinitive, which consists of the word ‘to’ plus the base form of a verb. An example is ‘to sit.

‘ You can think of an infinitive as kind of the raw form of a verb that hasn’t been conjugated, paired up with a subject or assigned a verb tense. One important thing to remember about infinitives is that you can’t have an infinitive phrase hanging out by itself, as it would be a sentence fragment, or incomplete sentence.Participles are another type of verb form and there are two kinds of participles. A present participle is a verb form that ends with -ing. Present participles are often used as adjectives.

Present participles can be used as verbs, but they aren’t complete verbs when used by themselves. You’d need to add something to the present participle, like a helping verb.A past participle is a verb form that usually ends with -ed or -d. Some verbs, called irregular verbs, don’t follow the typical patterns that most verbs do. Many past participles end with -t, -en, -n or -ne, though that’s not a complete list.

Past participles can be used as adjectives. For a regular verb, the past participle is the same as the past tense form. When paired with a helping verb – helping verbs include forms of the verbs ‘to be’ and ‘to have’ – a verb’s past participle will become part of the past perfect or present perfect tense of the verb.

Learning Outcome

After watching this lesson, you should be familiar with a few of the special verb forms, including irregular verbs and infinitives as well as past and present participles. You might be able to use them appropriately in sentences as a result of your studies.

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