**Rule**: The **Simple Past Tense** is used for a completed past action, which is then commented on. **Correct Usage**: 'broke' is the simple past action. The second clause ('which was very disappointing') describes the speaker's feeling about that past action. **Incorrect Options**: (b) 'was breaking' is an ongoing process. (c) 'had broken' would be used if this action happened before another past action. (d) 'breaks' is a present tense.

**Rule**: This sentence shows a sequence of past events. The earlier event is in the Past Perfect, and the later event is in the **Simple Past Tense**. **Correct Usage**: The doctors changing the medication ('had changed') happened first. The result, which came later, was that the patient 'felt' better. **Incorrect Options**: (b) 'was feeling' would imply an ongoing process of feeling better. (c) 'had felt' would illogically place the feeling before the cause. (d) 'feels' is a present tense.

**Rule**: This sentence describes a past ongoing action and the prior reason for it. The **Past Continuous** describes the ongoing action. **Correct Usage**: The ground 'was shaking' (the ongoing event). The reason for it was the prior long duration of rain ('had been raining'). **Incorrect Options**: (a) 'shook' is a short, completed action. (b) 'had shaken' is the wrong sequence. (d) 'shakes' is a present tense.

**Rule**: The **Simple Past Tense** is used to ask questions about completed actions at a specific (though unstated) time in the past. **Correct Usage**: 'When did you last get...?' is the standard structure for asking about the most recent occurrence of a past event. **Incorrect Options**: (b) 'were, getting' asks about an ongoing action at a specific past moment. (c) 'had, gotten' would need another past reference. (d) 'do, get' is a present tense.

**Rule**: The **Simple Past Tense** is used for an action that was completed at a specific, stated time in the past. **Correct Usage**: The phrase 'last year' is a definite time in the past, so the Simple Past 'wrote' is the correct choice to describe the completed action. **Incorrect Options**: (b) 'was writing' (Past Continuous) implies the action was in progress, not completed. (c) 'had written' (Past Perfect) would be used if this action happened before another past action. (d) 'had been writing' (Past Perfect Continuous) would emphasize the duration of the writing process.

**Rule**: The **Past Perfect Tense** is used for past achievements that are the reason for a subsequent past feeling or state. **Correct Usage**: The team 'felt' confident (past state) because they 'had won' all their matches in the period before that moment. **Incorrect Options**: (a) 'won' (Simple Past) is less precise. (b) 'were winning' suggests an ongoing match. (d) 'win' is a present tense.

**Rule**: The **Past Continuous Tense** is used to describe two simultaneous, ongoing background actions in the past that create a scene. **Correct Usage**: The wind 'was blowing' and the ship 'was struggling' were two parallel, continuous actions happening at the same time. **Incorrect Options**: (a) 'blew' (Simple Past) is less descriptive. (b) 'had blown' and (d) 'had been blowing' would place the wind's action before the ship's struggle.

**Rule**: The **Past Perfect Continuous Tense** is used to emphasize the duration of a long, continuous action that occurred before another past event. **Correct Usage**: 'had been questioning' emphasizes the long, intense interrogation ('for ten hours') that happened before he 'confessed'. **Incorrect Options**: (a) 'questioned' is less descriptive. (b) 'were questioning' is the wrong sequence. (d) 'had questioned' (Past Perfect) focuses on the completion of the questioning.

**Rule**: The **Past Perfect Tense** is used for a state that existed for a period of time before another past event occurred. The past perfect of 'to have' is 'had had'. **Correct Usage**: The state of possessing the car ('had had') was true for one month before the accident ('had an accident'). **Incorrect Options**: (a) 'had' (Simple Past) is possible but less precise. (b) 'was having' and (d) 'had been having' are incorrect as 'have' (for possession) is stative.

**Rule**: The **Past Perfect Continuous Tense** is used to emphasize the duration of a difficult or long action that occurred before a concluding past event. **Correct Usage**: 'had been traveling' emphasizes the long, difficult journey ('for days') that happened before they 'were rescued'. **Incorrect Options**: (a) 'traveled' is less descriptive. (b) 'were traveling' is the wrong sequence. (d) 'had traveled' (Past Perfect) focuses on completion.