What motivations does friar laurence have for helping juliet in act IV?

Answer 1

She is scared that friar Lawrence might have given her a potion that would actually killer her

Answer 2

"What if it be a poison which the friar subtly hath minister'd to have me dead, lest in this marriage he should be dishonoured because he married me before to Romeo."

Killing Juliet might prevent the acute moral difficulty of solemnizing a bigamous marriage between her and Paris, to say nothing of what would happen to Friar Lawrence if it got out.

Answer 3

The potion might actually kill her, or she might wake up before romeo comes

Answer 4

He wants to save her life. She says that if the friar cannot come up with a plan, she will kill herself rather than submit to the marriage with Paris.

Answer 5

She wonders whether the Friar would poison her to cover up the fact that he has married her once and is now being asked to marry her again.