Understanding how "is" functions before a verb helps writers clarify sentence structure and avoid common grammar issues. This guide focuses on the role of "is" as a linking verb and its impact on readability.
By examining real patterns and common mistakes, you can strengthen your sentences and improve clarity across professional and academic writing.
| Sentence Pattern | Role of "Is" Before the Verb | Clause Type | Example |
|---|---|---|---|
| Subject + Is + Present Participle | Forms present progressive tense | Continuous aspect | The team is reviewing the data. |
| Subject + Is + Past Participle | Forms passive voice | Passive construction | The report is written by the analyst. |
| Subject + Is + Adjective | Links subject to description | Subject complement | The result is surprising. |
| Subject + Is + Noun Phrase | Equates subject with identifier | Subject complement | Success is a journey. |
Using Is in Progressive Tenses
When "is" appears before a present participle, it creates a progressive tense that emphasizes ongoing action.
This structure is common in both spoken and written English, especially when you want to highlight duration or continuity.
Key Indicators
Look for forms like "is running," "is thinking," or "is preparing" to identify progressive constructions.
Passive Voice With Is
In passive constructions, "is" precedes a past participle to shift the focus from the doer to the receiver of the action.
This pattern is useful when the actor is unknown, irrelevant, or intentionally omitted.
Recognizing Passive Voice
Sentences with "is followed by a past participle" often signal passive voice, especially in formal or technical contexts.
Subject Complement Structures
"Is" can link the subject to a noun or adjective that renames or describes it, forming a subject complement.
These structures clarify identity, state, or quality without indicating direct action.
Identifying Subject Complements
After "is," ask whether the following word renames the subject or describes its condition to confirm a subject complement.
Common Misuses and How to Avoid Them
Misplacing "is" or pairing it incorrectly with other verbs can create awkward or confusing sentences.
Developing an eye for standard patterns helps you spot and correct these issues early.
Troubleshooting Examples
Compare weak patterns like "is knowing" with clear alternatives such as "knows" or "is aware of" to reinforce correct usage.
Key Takeaways for Clear Writing
- Recognize progressive and passive patterns by identifying "is" followed by -ing or past participle forms.
- Use subject complements after "is" to describe identity or qualities effectively.
- Replace wordy "is" structures with stronger verbs when possible.
- Review sentence focus to determine whether action, description, or identity is the primary intent.
FAQ
Reader questions
Does "is" always link to a verb when used before one?
No, "is" before a verb usually forms a progressive tense or passive voice, while "is" followed by a noun or adjective acts as a linking verb describing a complement.
Can "is" be part of a command or question?
Yes, in questions like "Is arriving early required?" the structure still follows the same grammatical rules for linking or forming tenses.
How can I spot unnecessary "is" constructions in my writing? Look for wordy phrases where "is" plus a noun or adjective could be replaced with a stronger verb to improve clarity and impact. What is a quick test to confirm correct use of "is" before a verb?
Replace "is [verb]" with a single precise verb; if the meaning stays clear, the original structure may be unnecessarily complex.