Choose an exam and explore concepts through visual explanations, topic maps and revision checks. Open the full chapter notes whenever you need more detail.
THE VISUAL LEARNING STUDIO
See the idea. Understand the connection.
35 visual explanations across 29 chapters, with topic maps throughout the library.
The chapter index will grow as additional notes are prepared. Chapters shown here are a learning collection, not a claim that the entire exam syllabus is complete.
SEE IT. CONNECT IT. EXPLAIN IT.
Understand the chapter visually
Start with the topic map, then open each explanation below. Detailed concept diagrams are being added to this chapter.
Use Recall mode to hide explanations; tap or focus a card to reveal one. Expand any diagram for a larger view.
Study the expanded notes and the credited detailed textbook lessons. The current chapter index covers core topics; it is not a claim of exhaustive coverage of every examination syllabus. Check the official syllabus and primary references.
Subject–Verb Agreement — lesson overview
Find the grammatical subject
In standard present-tense English, a third-person singular subject generally takes a verb with -s or -es: “She teaches.” Plural subjects generally use the base form: “They teach.”
The verb agrees with the subject, not automatically with the nearest noun. In “The quality of the answers is improving,” the subject head is quality, not answers.
To analyse a long sentence, temporarily separate descriptive phrases and identify who or what the sentence is about.
Common patterns
Subjects joined by “and” normally take a plural verb when they refer to distinct persons or things: “Nitish and Abhishek are teachers.”
Indefinite pronouns such as each, everyone, and somebody are normally grammatically singular: “Each student has a notebook.”
“A number of students are absent” and “The number of students is increasing” differ in their grammatical focus. Do not treat their similar words as identical structures.
Meaning and context
Collective-noun agreement can depend on variety of English and whether the group is viewed as a unit or as individuals. Context matters; avoid declaring every plural verb with a collective noun universally wrong.
A question or inversion can place the subject after the verb: “Where are the books?” The word order does not remove the agreement relationship.
After correcting a sentence, explain the subject head and the verb form. This strengthens transferable grammar knowledge.
