四年级上册英语需要背诵的句子涵盖了多个主题，包括问候、自我介绍、描述物品、表达喜好等。以下是一些建议的背诵句子，它们有助于提高学生的英语口语和表达能力：

问候语：Good morning/afternoon/evening. How are you? Fine, thank you. And you?

自我介绍：My name is [name]. I'm [age] years old. I'm from [city/country].

描述物品：This is a [book/pencil/toy]. It's [color]. It's very [big/small/cute].

表达喜好：I like [playing football/reading books/watching TV]. What about you?

请求帮助：Can you help me, please? Sure, what do you need?

感谢与回应：Thank you very much. You're welcome.

道歉与回应：I'm sorry. That's OK.

通过背诵这些句子，学生可以更好地掌握基本的英语交流技巧，并在日常生活中加以应用。同时，鼓励学生积极参与英语角、与同学进行对话练习，以提高口语水平和自信心。