In English, particles are small words that have grammatical or functional roles, but they do not change in form. They are typically used in conjunction with verbs to add meaning, or they serve as connectors in sentences. Here are the main types of particles used in English:

1. Prepositional Particles:

These are prepositions used with verbs to create phrasal verbs, changing the meaning of the verb. For example:

• "Give up" (meaning to quit)
• "Look after" (meaning to take care of)

In these cases, "up" and "after" are particles because they change the meaning of the base verbs "give" and "look."

2. Infinitive Particle ("to"):

The word "to" is used before the base form of a verb to indicate the infinitive form. It doesn't have meaning on its own but helps express intention or action:

• "I want to learn."
• "She likes to swim."

In both examples, "to" is a particle that accompanies the verbs "learn" and "swim."

3. Negation Particle ("not"):

"Not" is used to make verbs negative. It negates the verb it accompanies and can appear with auxiliary verbs:

• "I am not going."
• "She does not like pizza."

Here, "not" serves as a particle that creates a negative form of the sentence.

4. Modal Particles:

These particles modify the mood of a statement, often expressing emphasis or certainty. Some common modal particles include "just", "even", and "only":

• "He just left."
• "I only have one book."