“簽合同”的英文翻譯是 **"sign a contract"**。

**其他相關(guān)表達(dá)：**

* **簽署合同：** sign the contract
* **簽訂合同：** enter into a contract
* **與...簽合同：** sign a contract with...
* **合同簽署（名詞）：** contract signing / execution of the contract

**例句：**
* 我們準(zhǔn)備明天簽合同。
* We are ready to **sign the contract** tomorrow.
* 雙方已于上周簽訂了合同。
* Both parties **entered into the contract** last week.

所以，根據(jù)具體語(yǔ)境，最常用和直接的翻譯是 **"sign a contract"**。