Your thesis statement should include the following
Concise. A good thesis statement is short and sweet—don’t use more words than necessary. State your point clearly and directly in one or two sentences.
Contentious. Your thesis shouldn’t be a simple statement of fact that everyone already knows. meaning it should be something that people are going to learn in you essay or read about.
Coherent. Your thesis statement might mention several aspects of your topic, but they should all add up to a coherent whole, expressing one main idea.
When using the active voice, the subject comes before the verb with the action (Samantha returned). Passive sentences have a noun with the action being done TO them (cake was made, buildings were built, coach was pushed)