考研英语作文中常见的句型包括：
There be结构
There is a boat in the river. 河里有条船。
There are other techniques that might help you with your studying. 还有其它一些技巧可以帮助你学习。
There is more entertainment in a good book than in a month of typical TV programming. 书里的快乐远远胜过电视的一个月的典型节目。
What’s wrong with sb./sth.？
What’s wrong with your watch？ 你的手表有什么毛病？
How do you like...？
How do you like China？ 你觉得中国怎么样？
What do you like about...？
What do you like about China？ 你喜欢中国的什么？
主语-系动词-表语（SVC）
The weather is cold today. 今天天气很冷。
主语-动词-宾语（SVO）
She sings a song. 她唱了一首歌。
主语-动词（SV）
Dogs bark loudly. 狗大声叫。
主语-动词-宾语-宾语补足语（SVOC）
They built a new house. 他们建了一座新房子。
复合句型
When it comes to education, some people think that more emphasis should be placed on practical skills, while others argue that theoretical knowledge is equally important.
定语从句
The book written by Mo Yan is very popular among teenagers.
状语从句
If it rains tomorrow, we will stay at home.
这些句型在考研英语作文中非常常见，掌握它们有助于提高作文的分数和表达的准确性。建议在平时的学习和练习中多运用这些句型，以增强自己的语言表达能力。