**Rule**: The **Present Continuous Tense** is used to describe an official action that is currently in progress. The noun 'police' is plural. **Correct Usage**: 'are searching' correctly describes the ongoing activity of the police at the scene. **Incorrect Options**: (a) 'search' (Simple Present) is a habit. (c) 'have searched' (Present Perfect) means the search is complete. (d) 'searches' is a singular verb.

**Rule**: The **Present Perfect Tense** is used for a past action with a direct result in the present. **Correct Usage**: The past action is losing the keys, and the present result is that 'he can't get into his apartment'. 'has lost' correctly links the two. **Incorrect Options**: (a) 'loses' (Simple Present) is a habit. (b) 'is losing' (Present Continuous) is illogical. (d) 'has been losing' would suggest a continuous or repeated process.

**Rule**: The **Present Perfect Tense** is used to talk about the number of times an action has been repeated up to the present. **Correct Usage**: 'have seen' correctly quantifies the experience of watching the movie so far. **Incorrect Options**: (a) 'see' (Simple Present) is a habit. (b) 'am seeing' is for now. (d) 'sees' is a singular verb.

**Rule**: The **Simple Present Tense** is used for scientific facts and general, timeless truths. **Correct Usage**: The fact that the Moon reflects the Sun's light is a permanent scientific principle. The subject 'The Moon' is singular, requiring the verb 'reflects'. **Incorrect Options**: (a) 'is reflecting' (Present Continuous) would imply this is a temporary action. (c) 'has reflected' (Present Perfect) is the wrong tense for a universal fact. (d) 'reflect' is a plural verb.

**Rule**: The **Simple Present Tense** is used to state a permanent characteristic or fact. 'To bear a resemblance' is a formal way to say 'to look like'. **Correct Usage**: 'bears' correctly states a permanent, factual characteristic. The subject 'He' is singular. **Incorrect Options**: (a) 'is bearing' is incorrect as this is a state, not an action. (b) 'has borne' is the wrong tense. (d) 'bear' is a plural verb.

**Rule**: The **Present Perfect Continuous Tense** is used to explain a present result ('The ground is wet') by describing the continuous action that caused it over a period of time ('all night'). **Correct Usage**: 'has been raining' correctly links the prolonged period of rain with its visible consequence. **Incorrect Options**: (a) 'rains' (Simple Present) is a habit. (b) 'is raining' (Present Continuous) means it's still raining now. (d) 'rained' (Simple Past) is also possible but doesn't emphasize the continuous nature of the rain as well.

**Rule**: The **Present Perfect Continuous Tense** is used with adverbs like 'lately' or 'recently' to talk about repeated actions that have been happening in the near past and are likely to continue. **Correct Usage**: 'have been receiving' correctly describes the series of complaints that have been coming in over a recent period. **Incorrect Options**: (a) 'receive' (Simple Present) is a habit. (b) 'are receiving' (Present Continuous) focuses on the present moment. (d) 'receives' is a singular verb.

**Rule**: **Stative Verbs**. 'Consist' is a stative verb describing composition and is not used in continuous tenses. The **Simple Present Tense** is used for scientific facts. **Correct Usage**: 'consists' correctly states the chemical makeup of water. The subject 'Water' is singular. **Incorrect Options**: (b) 'is consisting' is grammatically incorrect. (c) 'has consisted' is the wrong tense. (d) 'consist' is a plural verb.

**Rule**: **Stative Verbs**. 'Depend' is a stative verb expressing a state of reliance or connection. It is not used in continuous tenses. **Correct Usage**: 'depends' is the correct form to state this general truth about the speaker's opinion. The subject 'My opinion' is singular. **Incorrect Options**: (b) 'is depending' is grammatically incorrect. (c) 'has depended' is the wrong tense for a general truth. (d) 'depend' is a plural verb.

**Rule**: The **Present Perfect Tense** with 'just' is used to announce a very recent event that has important present consequences. **Correct Usage**: 'have just made' perfectly captures the breaking news of the discovery and its immediate impact. The subject 'The archaeologists' is plural. **Incorrect Options**: (a) 'make' (Simple Present) is a habit. (b) 'are making' (Present Continuous) is for an ongoing process. (d) 'makes' is a singular verb.