In this section, look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If (a), (b), or (c) is better than the underlined part, indicate your response on the Answer Sheet against the corresponding letter (a), (b), or (c). If none of the substitutions improves the sentence, indicate (d) as your response on the Answer Sheet. Thus a "No improvement" response will be signified by the letter (d).
In a few minutes' time, when the clock strikes six, I would be waiting here for an hour.
shall have been waiting
English Grammar: Analyzing Sentence Correction
The question asks us to examine the underlined part of the given sentence and determine if any of the provided substitutions improve the sentence. We need to understand the grammatical context and tense usage.
The original sentence is:
"In a few minutes' time, when the clock strikes six, I would be waiting here for an hour."
The underlined part is "would be waiting here for an hour".
Understanding the Time Context and Tense
The sentence describes a situation at a specific point in the future: "when the clock strikes six". It also mentions a duration leading up to that future point: "for an hour". This means that at the exact moment the clock strikes six, the action of waiting will have been ongoing for a full hour.
This kind of situation - an action that continues up to a certain point in the future and whose duration is mentioned - requires the future perfect continuous tense. The structure of the future perfect continuous tense is generally:
Subject + will/shall + have + been + Verb-ing + ...
In this specific context, with "I", 'shall' is often used, though 'will' is also common and accepted in modern English.
Analyzing the Options
Let's look at the provided options:
- shall be waiting on
- shall have been waiting
- shall wait
- No improvement
Option 1: shall be waiting on
"shall be waiting" is the future continuous tense. This tense is used for an action that will be in progress at a specific time in the future. While "waiting" will be in progress, the addition of "for an hour" indicates duration leading up to that point, which is not the primary function of the future continuous. Also, the word "on" is grammatically incorrect in this context. It doesn't fit with "waiting here".
Option 2: shall have been waiting
"shall have been waiting" is the future perfect continuous tense. This tense is used to express an action that will continue up to a certain point in the future, and it often emphasizes the duration of the action. The phrase "for an hour" perfectly fits the use case for the future perfect continuous tense, indicating the duration of the waiting action up to the future point "when the clock strikes six". This tense correctly captures the intended meaning.
Option 3: shall wait
"shall wait" is the simple future tense. This tense is used for actions that will happen in the future. It does not convey the idea of an action that is ongoing for a specific duration leading up to a future point. It simply states that the waiting will happen.
Option 4: No improvement
The original sentence uses "would be waiting here for an hour". "would be waiting" is often used for conditional sentences or sometimes as a less definite form of future continuous. However, in this clear future context with a specified duration leading to a future point ("for an hour" until "when the clock strikes six"), the future perfect continuous tense ("shall have been waiting") is the most appropriate and grammatically accurate tense.
Conclusion
Comparing the options, "shall have been waiting" (Option 2) is the only form that correctly uses the future perfect continuous tense to describe an action that will have been ongoing for a specific duration ("for an hour") leading up to a future point in time ("when the clock strikes six"). Therefore, it provides the best improvement over the original sentence.
| Option | Underlined Part Substitution | Tense Used | Analysis |
|---|---|---|---|
| Original | would be waiting here for an hour | Conditional/Future Continuous (less appropriate for duration) | Not the most precise tense for duration leading to a future point. |
| (a) | shall be waiting on | Future Continuous + incorrect preposition | Doesn't convey duration leading to future point; "on" is wrong. |
| (b) | shall have been waiting | Future Perfect Continuous | Correctly conveys duration leading up to a future point. Best fit. |
| (c) | shall wait | Simple Future | Doesn't convey duration leading up to a future point. |
| (d) | No improvement | N/A | Improvement is possible with option (b). |
Revision Table: Key Tenses for Future Actions
| Tense | Structure (Subject + ...) | Use Case Examples |
|---|---|---|
| Simple Future | will/shall + base verb | For actions that will happen in the future: "I will go home." |
| Future Continuous | will/shall + be + verb-ing | For actions that will be in progress at a future time: "At 6 PM, I will be eating dinner." |
| Future Perfect | will/shall + have + past participle | For actions that will be completed before a future time: "By 7 PM, I will have finished dinner." |
| Future Perfect Continuous | will/shall + have + been + verb-ing | For actions that will continue up to a future time, often with emphasis on duration: "By 8 PM, I will have been studying for three hours." |
Additional Information: 'Shall' vs 'Will'
Traditionally, 'shall' was used with 'I' and 'we' to form the future tense, while 'will' was used with other subjects. However, in modern English, 'will' is commonly used with all subjects, and 'shall' is less frequent in everyday speech for simple future.
However, 'shall' is still used:
- To make suggestions or offers with 'I' and 'we' (e.g., "Shall we go?").
- To express strong determination or a command (e.g., "You shall not pass!").
- In legal or formal contexts.
- In some dialects of English.
In the context of forming future perfect continuous tense, both 'will have been' and 'shall have been' are grammatically correct, especially in formal writing or traditional grammar exercises.
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