I don't know what you are asking for.
Chambers testified before the HUAC against Hiss and claiming that Hiss belonged to an underground communist organization.
should be " testified " and " claimed "....so their both past tense
1. Should've Studied (I think?)
2. Stayed
3. Helped
4. Forgot
5. Shouldn't have Spoke
6. Said
Jim Crow laws still existed in the southern states
The third sentence is correctly capitalized because it follows the rules of capitalization and capitalizing of a sentence.
