Final answer:
In English, the 1st person plural pronouns are 'we', 'us', 'our', and 'ours', which denote the speaker plus others in a group.
Step-by-step explanation:
The 1st person plural pronouns include 'we', 'us', and the possessive forms 'our' and 'ours'. These pronouns are used when the speaker is including themselves in the group they are talking about.
For instance, in the sentence 'We are going to the park', 'we' serves as the subject of the sentence, referring to the speaker and at least one other person. In the sentence 'The teacher gave us homework', 'us' is the object pronoun being used to refer to the same group.
The possessive case pronouns are used to show ownership, for example, 'That is our book' or 'The opinions are ours'.