Final answer:
The correct use of subject and object pronouns depends on their function in a sentence, whether they are performing an action or receiving it. For the given sentences, the appropriate subject or object pronouns are 'They/it/You/her/It/him/We/you/I/them'. Understanding these grammatical structures is key to using pronouns correctly.
Step-by-step explanation:
Understanding Subject and Object Pronouns
Subject and object pronouns are used differently in sentences, depending on their grammatical function. The correct forms for the sentences provided can be determined by identifying whether the pronoun is acting as the subject of the verb or as the object of the verb or preposition.
They are both in grade 4. (Subject pronoun)
Can you see it? (Object pronoun)
You are Spanish. (Subject pronoun)
Happy Birthday to her! (Object pronoun)
It is red. (Subject pronoun)
Can you hear him? (Object pronoun)
We always help each other. (Subject pronoun)
It's good for you! (Object pronoun)
I like football so much! (Subject pronoun)
Look at them! (Object pronoun)
Being aware of these differences can significantly improve grammatical accuracy in writing. Both subjects and objects have their respective cases, such as the subjective case pronouns like 'I' and 'we', and objective case pronouns like 'me' and 'us'. This distinction applies to compound structures as well. In addition, possessive case pronouns, like 'mine' and 'yours', indicate ownership or relation.