Contracts That Must Be in Writing 必须以书面订立的合同
I agree to mow your lawn. You agree to pay me $25. I mow your lawn you give me $15. I threaten to sue.我同意替你刈（yi）草坪。你答应付给我25美元。我刈了你的草坪。你给了15美元。我以起诉要挟。
I agree to mow your lawn. You agree to pay me $25. I mow your lawn you give me $15. I threaten to sue.我同意替你刈（yi）草坪。你答应付给我25美元。我刈了你的草坪。你给了15美元。我以起诉要挟。