23. In which sentence did the boy's crush come over while he was cleaning?

Question

BlackTom AI · Accepted Answer

First, restating the question and options helps anchor the analysis: the question asks which sentence correctly conveys that the boy’s crush came over while he was cleaning. Options:
- 1) He cleaned when she coming over.
- 2) He cleaned when she came over.
- 3) He cleaning when she visited.
- 4) He was cleaning when she visited.

Option 1 analyzes the tense and aspect: 'cleaned' would be past tense, but the continuation 'when she coming over' uses a present participle 'coming' instead of a past form. This pairing creates a tense inconsistency and renders the sentence ungrammatical.

Option 2 uses 'He cleaned when she came over.' Here, the simple past tense 'cleaned' with 'came over' is grammatically acceptable in some contexts, but the clause 'when she came over' indicates a completed action in the past. However, the juxtaposition with 'He cleaned' lacks a continuous aspect that would more naturally express an ongoing action occurring as she arrived. It feels off compared to the progressive form that emphasizes the ongoing cleaning at the moment of arrival.

Option 3 contains 'He cleaning when she visited.' This option misuses a participle form without a helping verb, producing a grammar error: 'He cleaning' is not a correct verb phrase. The sentence also uses 'visited' (past tense) inconsistently with the present participle structure, making it ungrammatical.

Option 4 uses the correct continuous aspect and proper past tense: 'He was cleaning when she visited.' The past continuous 'was cleaning' signals an ongoing action in the past, and the past simple 'visited' indicates the moment of arrival in the past. The temporal sequence is clear: he was in the middle of cleaning, and she visited during that time, which matches the intended meaning of the question.

In sum, the main sources of error in the other options are tense/aspect mismatches (Option 1), awkward tense combination with a simple past that weakens the simultaneous action sense (Option 2), and missing auxiliary for the progressive form plus incorrect participle structure (Option 3). Option 4 aligns perfectly with standard English grammar for a past continuous action interrupted or occurring at the time of her visit, producing the most natural and correct sentence.

23. In which sentence did the boy's crush come over while he was cleaning? 单项选择题

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