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Lesson 1

Mastering Subject-Verb Agreement in Complex Sentences

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Welcome to your first lesson. This course is designed to sharpen your English grammar so you can describe complex technical situations with precision and confidence, particularly in job interviews.

Today, we begin with a fundamental pillar of clear communication: subject-verb agreement. While you have a good handle on basic sentences, this lesson will give you the tools to maintain accuracy in more complex situations. Specifically, we'll focus on ensuring your subject and verb agree even when they are separated by other words or phrases. Mastering this will make your technical descriptions sound more professional and authoritative.

The Core Challenge: Finding the True Subject

The basic rule is simple: a singular subject takes a singular verb, and a plural subject takes a plural verb.

  • Singular: The system is stable.
  • Plural: The systems are stable.

The challenge in technical English is that the subject and verb are often separated by descriptive phrases. This separation can make it tempting to match the verb to the wrong noun. Your main task is always to identify the true subject of the sentence and ignore the "noise" in between.

Consider this example:

The validation of the input parameters is crucial for security.

Here, the true subject is validation (singular). The noun parameters is part of a prepositional phrase (of the input parameters) that describes the validation. The verb is must agree with validation, not with parameters. Making the verb agree with the closer noun (parameters are) is a common error that we will learn to eliminate.

Principle 1: Prepositional Phrases are Not the Subject

The most common type of interrupting phrase is a prepositional phrase. These phrases, which often begin with words like of, in, on, for, with, to, and from, add descriptive information but never contain the main subject of the sentence.

To master this, we'll consult a guide that explains this principle clearly.

Tutorial #4: Advanced Subject/Verb Agreement

This tutorial from the College of San Mateo Writing Center provides a clear, principle-based approach to handling subject-verb agreement. It directly addresses the issue of subjects being separated from verbs.

Please read Part Two of the tutorial, titled "Checking for Agreement When the Subject Is Separated from the Verb." Start from the paragraph that begins "Although there are some exceptions..." and continue to the end of that section, just before Exercise 1. Focus on Principle I: Nouns that follow prepositions cannot be subjects. Pay close attention to the example sentence breakdown and the list of common prepositions.

Now, let's put this principle into practice with scenarios from software engineering. Your task is to identify the true subject and choose the correct verb.

Practice Drill 1: Find the True Subject

For each sentence, identify the singular or plural subject and select the correct verb form.

  1. The performance of our legacy systems (is / are) a constant concern.
  2. A list of required dependencies (is / are) included in the README.md file.
  3. The main reason for these outages (was / were) a memory leak in the application server.
  4. The functions within this specific module (needs / need) to be refactored.
  5. The color of the buttons on the new UI (looks / look) inconsistent.
Answers
  1. is. The subject is performance (singular). "of our legacy systems" is a prepositional phrase.
  2. is. The subject is list (singular). "of required dependencies" is a prepositional phrase.
  3. was. The subject is reason (singular). "for these outages" is a prepositional phrase.
  4. need. The subject is functions (plural). "within this specific module" is a prepositional phrase.
  5. looks. The subject is color (singular). "of the buttons" and "on the new UI" are prepositional phrases.

Principle 2: Add-on Phrases Don't Count

Another common pattern involves phrases that begin with along with, as well as, together with, or in addition to. These phrases add extra information but do not make a singular subject plural. You must treat them as interruptions and match the verb to the main subject only.

This chart provides a quick visual summary of several key rules. Rule #2 is particularly relevant to what we are discussing now.

Let's look at how this works in a technical context.

  • The lead architect, as well as the junior developers, is attending the design review.
    • Subject: architect (singular) -> Verb: is
  • The primary database, along with its read replicas, was taken offline for maintenance.
    • Subject: database (singular) -> Verb: was

Tricky Situations for Subject-Verb Agreement

This article from Proof-Reading-Service.com offers concise explanations for many difficult cases. We'll focus on the section about these "add-on" phrases.

Please find and read section #4, titled "Subjects Expanded with 'along with,' 'together with,' 'as well as'". This will reinforce the idea that these phrases are modifiers, not part of the subject.

Practice Drill 2: Ignore the Add-ons

Choose the correct verb form for these sentences.

  1. The new feature, along with all its related bug fixes, (is / are) ready for deployment.
  2. The server, as well as the network switches, (was / were) rebooted to solve the issue.
  3. My manager, together with the project leads, (reviews / review) the weekly progress report.
Answers
  1. is. The subject is feature (singular).
  2. was. The subject is server (singular).
  3. reviews. The subject is manager (singular).

Reinforcing the Rules with Video

To solidify these concepts and hear them explained in a different way, we will watch parts of a helpful video. It covers many rules, but we will focus only on those that relate to our topic of separating the subject from the verb.

10 Rules for SUBJECT-VERB AGREEMENT | Free Practice | English Grammar

This "English Speaking 360" video provides clear examples and practice for 10 common subject-verb agreement rules. We'll use it to reinforce the principles we've just covered.

Please watch the following sections: Rule 7: Conjunctions. This covers the "add-on" phrases like as well as and along with. Notice how the speaker advises removing the additional phrase to find the true subject. Rule 10: Expressions with 'one'. This is an excellent example of an interrupting prepositional phrase (one of the...). The true subject is always one (singular). For example, "One of my pull requests is still pending."

Final Practice: Building Your Own Sentences

Your goal is to produce correct sentences automatically. Let's practice building them from scratch. Use the given components to write a single, grammatically correct sentence.

Example:

  • Subject: The logic (singular)
  • Interrupting Phrase: in these nested conditional statements
  • Verb: to be
  • Complement: very complex
  • Your Sentence: The logic in these nested conditional statements is very complex.

Now, it's your turn.

  1. Subject: The connection (singular)
    Interrupting Phrase: to the external APIs
    Verb: to seem
    Complement: unstable

    Your Sentence:

  2. Subject: The migration (singular)
    Interrupting Phrase: of the user databases
    Verb: to require
    Complement: careful planning

    Your Sentence:

  3. Subject: The senior developer (singular)
    Interrupting Phrase: along with her team
    Verb: to be
    Complement: responsible for the backend services

    Your Sentence:

  4. Subject: One (singular)
    Interrupting Phrase: of my most challenging projects
    Verb: to be
    Complement: the optimization of the search algorithm

    Your Sentence:

Suggested Sentences
  1. The connection to the external APIs seems unstable.
  2. The migration of the user databases requires careful planning.
  3. The senior developer, along with her team, is responsible for the backend services.
  4. One of my most challenging projects was the optimization of the search algorithm. (Or is if it's current).

Conclusion

Excellent work. Today, you've focused on the crucial skill of maintaining subject-verb agreement in complex technical sentences. The key is to train your eye to find the true subject and mentally set aside any interrupting phrases, whether they are prepositional phrases (like of the databases) or add-on phrases (like as well as the team). Consistently applying this will make your speech and writing significantly more precise.

In our next lesson, we will explore the passive voice. You'll see how today's practice of identifying subjects is a critical first step for correctly transforming sentences from active to passive, a structure that is extremely common when describing the status of systems and data.