1. Infinitive: The base form of the verb, often preceded by "to".
* Example: *to run*, *to eat*, *to sleep*
2. Present Participle (or -ing form): Formed by adding "-ing" to the base form.
* Example: *running*, *eating*, *sleeping*
3. Past Tense: Indicates an action that happened in the past.
* Example: *ran*, *ate*, *slept*
4. Past Participle: Used to form perfect tenses (e.g., present perfect, past perfect) and passive voice.
* Example: *run*, *eaten*, *slept*
5. Base Form: The simple form of the verb, used in the present tense and imperative mood.
* Example: *run*, *eat*, *sleep*
It's important to note: Some verbs have irregular forms, meaning they don't follow the standard rules for forming the past tense and past participle. For example, the verb "go" has the past tense "went" and the past participle "gone."
Let's illustrate with an example using the verb "walk":
* Infinitive: to walk
* Present Participle: walking
* Past Tense: walked
* Past Participle: walked
* Base Form: walk