How many past tenses are there? When do you use them?
There are 3 past tenses. You use the preterite tense is used to refer to actions that occurred at a fixed point in time. You use the imperfect tense is used to refer to actions in the past that occurred repeatedly. You use the past perfect is formed by combining the auxiliary verb “had” with the past participle.
What is the difference between a subject and object? Provide an example of each.
The subject refers to the person or the thing that is doing or being something. An example is: The new candidate is very intelligent. Candidate is the subject. The object is the receiver of action in a sentence. An example is: He posted a letter to her. Her is the object.
What are some differences between an animal cell and a plant cell?
Animal and plant cells are very similar however there are some organelles that plant cells have that animal cells do not that make them different. These organelles include: cell wall, vacuoles, and chloroplast.