Verbs: Expressing the Past

The phone rang when he was watching television.

Step 1: When one short action (Simple Past) interrupts a longer ongoing action (Past Continuous), we combine both tenses. Step 2: 'The phone rang' is the short, interrupting action – Simple Past is correct here. Step 3: 'He was watching television' was the ongoing background action – Past Continuous is correct here. Step 4: Option A uses Simple Past for both, which loses the sense of the ongoing background action. Step 5: Option C makes both actions continuous, which does not clearly show the interruption. Option D uses Past Perfect incorrectly.

She has just gone to the market.

Step 1: The Present Perfect tense is used for actions that have recently been completed or are linked to the present. Step 2: 'Has just gone' correctly uses Present Perfect with 'just', meaning the action was completed a very short time ago. Step 3: Option A is WRONG – we cannot use Present Perfect ('has gone') with a definite past time expression like 'yesterday'. Step 4: Option B uses Simple Past 'went' with 'yesterday', which is actually correct English, but does not use Present Perfect as required. Step 5: Option D is Present Continuous, which is wrong here.

already

Step 1: 'Already' is used with the Present Perfect to suggest that something has happened sooner than expected. Step 2: In this sentence, the speaker is saying the bill was paid even before being reminded – sooner than expected. Step 3: 'Yet' is used in questions and negative sentences (e.g., 'I haven't paid it yet'), not in positive statements like this. Step 4: 'Ever' is used to ask about experiences in one's lifetime (e.g., 'Have you ever visited Paris?'). Step 5: 'Since' relates to a point of time and is not used like this with the Present Perfect.

I haven't finished my homework yet.

Step 1: 'Yet' means 'until now' and is normally used in negative sentences and questions with Present Perfect. Step 2: 'I haven't finished my homework yet' is a negative sentence in Present Perfect – this is the correct usage. Step 3: Option A ('I have yet finished') is incorrect because 'yet' cannot come between the auxiliary and the main verb in a positive sentence this way. Step 4: Option B ('I have finished my homework yet') is a positive sentence; 'yet' is not used in positive statements. Step 5: Option D uses Past Perfect ('had yet finished'), which is incorrect.