起源背景句型

通过地质年代和化石研究引入主题，例如：'According to scientists' research, dinosaurs first appeared during the Triassic Period about 230 million years ago.' 此类句型需注意时态（一般过去时）和数字表达准确性。

分类描述句型

区分植食性与肉食性恐龙：'Herbivores like Brachiosaurus had long necks to reach leaves, while carnivores such as Velociraptors used sharp claws for hunting.' 建议搭配对比连词（while/whereas）和特征动词（had/used）。

科学假想句型

探讨灭绝原因的高分表达：'There are various theories about their extinction, with the asteroid impact theory being the most widely accepted.' 注意使用'there be'结构和学术词汇（theory/evidence）。

个人观点句型

结合现实生活的升华句：'Studying dinosaurs not only satisfies our curiosity but also reminds us to protect modern endangered species.' 使用not only...but also...等高级连词提升层次感。

几个练习句子

Dinosaurs lived millions of years ago.

恐龙生活在数百万年前。

Tyrannosaurus was one of the fiercest carnivorous dinosaurs.

暴龙是最凶猛的食肉恐龙之一。

Fossils help us understand what dinosaurs looked like.

化石帮助我们了解恐龙的样子。

If dinosaurs hadn't gone extinct, the world would be completely different.

如果恐龙没有灭绝，世界会完全不同。

Visiting the dinosaur museum taught me a lot.

参观恐龙博物馆让我学到很多知识。

结论

本文提供的恐龙主题万能句型覆盖描述、分析、推论三大核心写作需求，考生可根据考题灵活组合。重点记忆5-8个通用句型，并确保动词时态、专业名词拼写准确。建议配合恐龙相关词汇表（fossil/extinct/species等）同步复习，实现内容与语言的双重加分。