Passive Voice(被动语态)
The monkey ate the banana.(Active) The banana was eaten by the monkey.(Passive)
Latest Articles
Pronoun(代词)
We help them. They help us. He knows me. She knows him.
Special Sentences(特殊句型)
I want to go America this summer. It is America that I want to go to this summer.
Subjunctive(虚拟语气)
1. 什么是虚拟？ 非真实 2. 怎么表示虚拟？ 把谓语动词改变时态。一反常态，说明表达的事情是虚拟的。 3. 虚拟常用于？ if虚拟条件句；名词性从句；情态动词。
Tense(时态)
Tenses in English are made of a time and an aspect. English recognises 3 times (past, present and future) and 3 aspects (simple, continuous and perfect.)
The Non-Finite Verbs (非谓语动词)
英语动词分为限定动词（finite verb）和非限定动词（non-finite verb）。限定动词充当谓语，受主语的人称和数限制；非限定动词不随主语变化，形态固定，可充当主语、宾语、表语、定语、状语、补语等。非谓语动词的四种形式体现了英语词法的三个核心维度：派生词法（derivational morpholo...
Matrix Multiplication as Linear Transformation: An Intuitive Guide
Build an intuitive understanding of matrix multiplication as linear transformation — what matrices really do to space, basis vectors, and why this perspective makes linear algebra …
pip Complete Guide: Installing, Managing, and Troubleshooting Python Packages
pip is Python's package installer — the tool you use to install, upgrade, and manage third-party libraries. This guide covers everything from basic installat...
Tools for Writing and Publishing E-Books
A comprehensive guide to tools and platforms for writing, formatting,
LaTeX Essential Commands: A Practical Reference
A practical LaTeX reference covering document structure, text formatting, math equations, tables, figures, hyperlinks, and common packages.