一、基础句型结构

主-动-补结构（SVC）

动词为连系动词（如be, seem, become），后接名词/形容词/介词短语作补足语。例如：

- The cake tastes delicious.（系动词tastes后接形容词delicious作补语）

- The meeting started at 9 a.m.（系动词started后接时间状语at 9 a.m.作补语）

主-动结构（SV）

动词为不及物动词，状语非必需。例如：

- The weather is sunny today.（不及物动词is后直接接表语sunny）

- The problem lies in the details.（不及物动词lies后接介词in+名词短语作补语）

主-动-宾结构（SVO）

动词为及物动词，后接单宾语。例如：

- She reads a book every day.（及物动词reads后接单数宾语a book）

- The company launched a new product last month.（及物动词launched后接单数宾语a new product）

二、逻辑关系表达

结果/原因句型

- 结果：so...that...（如此...以至于...）

例：The movie was so exciting that I watched it twice.

- 原因：because of/about（因为）

例：The project failed because of poor planning.

- 推论：it is/was necessary that...（有必要做...）

例：It is necessary that we finish the task on time.

- 例证：

- The reason why he was late is that he forgot his wallet.

- There is no doubt that she is the best singer in the group.

让步/条件句型

- 让步：even though/although（即使）

例：Even though it rains, we will go for a picnic.

- 条件：if/whenever（如果）

例：If you call now, I will be home.

- 结果：so...that...（如此...以至于...）

例：The meeting started so late that we missed the lunch.

三、固定表达与习语

时间/频率表达

- 时间：as soon as（一...就...）

例：As soon as the meeting starts, we'll leave.

- 频率：every day/night/week（每天/夜/每周）

例：He practices English every day.

- 现象描述：time flies（时光飞逝）

例：We didn't realize how fast time was going.

特殊结构

- there is no denying that...（不可否认）

例：There is no denying that exercise is good for health.

- it goes without saying that...（不用说）

例：It goes without saying that honesty is always the best policy.

- as is known to us all...（众所周知）

例：As is known to us all, the earth revolves around the sun.

以上句型覆盖了日常交流、写作及考试中的高频用法，建议结合具体语境进行记忆和练习。