Because he stumbles upon Tom’s aunt and uncle, so he pretends to be Tom to try and free Jim because Jim is likely imprisoned on that plantation.
2. What happens when Tom appears on the scene?
Huck meets up with him and explains to him what he is doing and why he is doing it. Tom agrees to help Huck in his mission to free Jim from captivity.
3. What's the difference between Tom's plan for freeing Jim and Huck's?
Huck wants to free Jim because Jim is Huck’s best friend and he wants to help free his his friend; Tom, on the other hand, just wants to have an adventure and make it as exciting as possible.
4. How does Huck change when Tom comes?
With the arrival of Tom, Huck loses the ability to
“call the shots” and now can only do what Tom Sawyer thinks is the right thing to do.
5. Tom's plan is actually cruel. Why?
His plan is cruel because Jim is free to leave already, but Tom keeps dragging the scheme along to make it more theatrical, rather than just give him his freedom and Jim is forced into a stressful situation by being forced to wait to be free.
6. What more do we learn about Tom in these chapters?
Tom is childish and would rather live like the fictional worlds in his books than live realistically. He also is not as logical as Huck and would prefer to appear valiant in his actions and take longer rather than just get them done.