Combining Sentences: Understanding "So... That" and "Too... To"

The question asks us to find the best way to combine two simple sentences: "He is too tired." and "He could not stand." These two sentences express a cause-and-effect relationship where the extreme degree of tiredness (indicated by "too tired") is the reason for the inability to stand.

In English grammar, there are specific structures used to combine sentences that show this kind of relationship, especially when "too" is used in the first sentence to indicate an excessive degree of a quality or state.

The structure "too + adjective/adverb + to + verb" is commonly used. For example, "He is too tired to stand."

Another structure that expresses a similar meaning is "so + adjective/adverb + that + clause". This structure often follows from a "too... to" construction and expresses the consequence of the excessive degree. The consequence clause often includes a negative, like "cannot" or "could not".

Let's examine the given options to see which one correctly combines the original sentences while maintaining the intended meaning using an appropriate grammatical structure.

• Option 1: He is so tired that he could scarcely stand.

• Option 2: He is too tired and cannot stand.

• Option 3: He will not stand and he is very tired.

• Option 4: He is so tired that he could not be standing.

Analyzing Each Option for Sentence Combination

Let's break down each option:

• Option 1: He is so tired that he could scarcely stand.

  This option uses the "so + adjective + that + clause" structure. "So tired" indicates the degree of tiredness. The "that" clause, "he could scarcely stand," expresses the consequence of this tiredness. "Scarcely stand" means 'hardly stand' or 'almost unable to stand', which is a very close meaning to "could not stand" in this context. This structure correctly links the cause (being very tired) and the effect (inability to stand) using a standard grammatical pattern.

• Option 2: He is too tired and cannot stand.

  While grammatically correct as two connected clauses, this option does not use the standard "too... to" structure or its common "so... that" equivalent to show the specific degree-consequence relationship. The original sentence used "too tired" in a way that implies the "to stand" part, and combining it simply with "and cannot stand" is less precise than using "so... that". It just lists two facts rather than explicitly showing one results from the other in terms of degree.

• Option 3: He will not stand and he is very tired.

  This option significantly changes the meaning. "He will not stand" implies a refusal to stand, which is different from "He could not stand," which implies an inability due to tiredness. Therefore, this is not a correct combination of the original sentences' meanings.

• Option 4: He is so tired that he could not be standing.

  This option uses the "so + adjective + that + clause" structure, but the clause "he could not be standing" is slightly awkward compared to "he could not stand" or "he could scarcely stand". "Could not be standing" refers more to the state of being on one's feet, while "could not stand" refers to the action or ability to get into or maintain a standing position. While understandable, "could scarcely stand" or "could not stand" is a more typical way to express inability to perform the action due to exhaustion.

Comparing the options, Option 1 most accurately and idiomatically combines the two original sentences using the "so... that" structure to express the degree-consequence relationship, effectively conveying that the person was so tired they were almost unable to stand, which aligns well with "He could not stand."

Correct Sentence Combination

Based on the analysis, the correct combination that uses an appropriate structure ("so... that") and maintains the intended meaning is "He is so tired that he could scarcely stand."

Option 1 fits the "so... that" pattern and uses "scarcely stand," which is a common way to express the result of being extremely tired – being barely able to stand or almost unable to stand.

Revision Table: Key Sentence Structures

Additional Information: More on Sentence Combining and Transformation

Combining sentences helps improve the flow and sophistication of writing. Understanding how to use structures like "too... to" and "so... that" is essential for expressing relationships between ideas accurately. These structures are often used to express a cause-and-effect relationship where the cause is the intensity of a quality or action.

• Too... To: Used when the degree of something is more than what is needed or wanted, often preventing an action. It implies a negative result.

  Example: The box is too heavy to lift. (The box is so heavy that I cannot lift it.)

• So... That: Used to show the result or consequence of a particular degree of a quality or action.

  Example: The box was so heavy that he could not lift it. (He was too weak to lift the box because it was so heavy.)

Being able to transform sentences between these structures is a valuable skill in English grammar, demonstrating a good understanding of how different structures can convey similar meanings with slight variations in emphasis.