The given sentence is divided into three segments. Select the option that has the segment with a grammatical error. If there is no error, select 'no error' as your answer. By next year, / they will have / build their new tower.
build their new tower
Understanding the Grammatical Error in the Sentence
The question asks us to identify the segment of the sentence "By next year, / they will have / build their new tower" that contains a grammatical error.
Let's break down the sentence into its three segments:
- By next year,
- they will have
- build their new tower.
We need to examine each segment to check for any grammatical issues.
Analyzing Each Sentence Segment
Let's look at each part carefully:
- Segment 1: By next year,
This segment sets a time frame, indicating an action will be completed by a specific future point. The use of "By [time]" is standard for expressing a deadline or a point by which something will finish. This part is grammatically correct.
- Segment 2: they will have
This segment starts the verb phrase using the future perfect tense auxiliary verbs "will have". The future perfect tense is used to describe an action that will be completed before a specific point in the future. The structure is "subject + will have + past participle". This part contains the correct auxiliary verbs for the future perfect tense.
- Segment 3: build their new tower.
This segment contains the main verb "build" and the object "their new tower". The future perfect tense requires the past participle form of the main verb after "will have". The past participle of the verb "build" is "built", not "build". Therefore, "build" is the incorrect form here.
Identifying the Correct Verb Form for Future Perfect
The structure for the future perfect tense is:
Subject + will have + Past Participle of the main verb
In this sentence, the subject is "they" and the main verb is "build". The past participle of "build" is "built".
So, the correct verb phrase should be "will have built".
The segment "build their new tower" incorrectly uses the base form "build" instead of the past participle "built".
Conclusion on the Grammatical Error
Based on the analysis, the error lies in the third segment, which uses the wrong form of the verb "build". The segment "build their new tower" should be "built their new tower".
| Segment | Text | Analysis | Grammatical Status |
|---|---|---|---|
| 1 | By next year, | Sets a future deadline. | Correct |
| 2 | they will have | Auxiliary verbs for future perfect tense. | Correct |
| 3 | build their new tower. | Uses base verb 'build' instead of past participle 'built'. | Incorrect |
The segment with the grammatical error is " build their new tower".
Revision Table: Key Grammar Concepts
| Tense | Structure | Usage | Example |
|---|---|---|---|
| Future Perfect | Subject + will have + Past Participle | To express an action that will be completed before a specific time in the future. | By 5 PM, I will have finished my work. |
Additional Information: Verb Forms and Tenses
Understanding different verb forms is crucial for correct sentence construction in various tenses. For regular verbs, the past simple and past participle are often the same (e.g., walk, walked, walked). However, for irregular verbs like "build", the forms can be different (build, built, built). Knowing these forms is essential for using tenses like the future perfect, present perfect, and past perfect correctly.
The future perfect tense is often used with time expressions that indicate a completion point, such as "by tomorrow", "by next week", "before [a future event]", etc.
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