首先，我们需要明确合同的基本构成要素。一般来说，一个有效的合同应该包括以下内容：

1. 合同主体：包括合同双方的名称、地址、联系方式等基本信息。

2. 合同标的：即合同中涉及的具体内容，例如货物、服务、知识产权等。

3. 数量和质量：对于货物或服务的数量和质量进行明确约定。

4. 价款和支付方式：约定合同总价款、支付时间和方式等。

5. 履行期限和地点：约定合同履行的时间和地点。

6. 违约责任和争议解决方式：约定双方在违约情况下的责任和争议解决方式。

7. 签订时间、地点和份数：约定合同签订的时间、地点和份数。

基于以上要素，我们可以制定出一个英文合同模板，如下所示：

[合同标题]

This Contract is made and entered into on [签订时间] by and between:

Party A (以下简称“甲方”): [甲方信息]

Address: [甲方地址]

Contact: [甲方联系人]

Phone: [甲方电话]

Party B (以下简称“乙方”): [乙方信息]

Address: [乙方地址]

Contact: [乙方联系人]

Phone: [乙方电话]

Whereas, Party A and Party B have reached a consensus on [合同标的] and agreed to sign this Contract to clarify the rights and obligations of both parties.

Now Therefore, in consideration of mutual benefits and obligations, the parties agree as follows:

Article 1: Object of the Contract

Party A agrees to purchase from Party B [合同标的].

article 2: Quantity and Quality

The quantity and quality of the goods shall be as specified in Annex A attached hereto.

article 3: Price and Payment

The total price of the goods shall be [总价款]. Party B shall issue an invoice to Party A for the payment. Party A shall pay the invoice within [支付时间] days from the date of receipt.

article 4: Performance Time and Place

Party B shall deliver the goods to Party A at [履行地点] no later than [履行时间].

article 5: Default and Dispute Resolution

If either party defaults on its obligations under this Contract, it shall compensate the other party for any losses arising therefrom. Any disputes arising from or in connection with this Contract shall be settled through friendly negotiations. If no settlement can be reached through negotiations, either party may bring an action before the competent court.

article 6: Other Provisions

Other provisions not covered in this Contract shall be separately agreed upon by both parties.

In witness whereof, the parties have executed this Contract in duplicate as follows:

Party A: [甲方签字]

Party B: [乙方签字]

Executed on [签订时间] at [签订地点].

注：以上模板仅供参考，具体合同内容应根据实际情况进行修改和完善。