Put the verbs in the brackets into the correct present tense:
My daughter never (write) to me so I never (know) what she (do).

Question

Put the verbs in the brackets into the correct present tense: 
My daughter never (write) to me so I never (know) what she (do).

Accepted Answer

Here's a detailed explanation for the given question:

The question asks us to put the verbs in the brackets into the correct present tense. The sentence is: "My daughter never (write) to me so I never (know) what she (do)."

Let's analyze each part of the sentence and the appropriate tense:

1.  **"My daughter never (write) to me"**:
    *   The subject is "My daughter," which is a third-person singular noun.
    *   The adverb "never" indicates a habitual action or a general truth.
    *   For habitual actions or general truths with a third-person singular subject in the present tense, we use the Simple Present tense, adding '-s' or '-es' to the verb.
    *   Therefore, "(write)" becomes "writes."

2.  **"so I never (know)"**:
    *   The subject is "I," which is a first-person singular pronoun.
    *   Again, "never" indicates a habitual action or a general truth.
    *   For habitual actions or general truths with a first-person singular subject in the present tense, we use the base form of the verb in the Simple Present tense.
    *   Therefore, "(know)" becomes "know."

3.  **"what she (do)"**:
    *   This part describes an action or state that is currently happening or ongoing, about which the speaker is unaware.
    *   The subject is "she," which is a third-person singular pronoun.
    *   To express an action happening at the moment of speaking or an ongoing situation, we use the Present Continuous tense (am/is/are + verb-ing).
    *   Therefore, "(do)" becomes "is doing."

Combining these, the correct sentence should be: "My daughter never **writes** to me so I never **know** what she **is doing**."

Now let's evaluate the given options:

*   **Option 3: My daughter never writes to me so I never know what she is doing.**
    *   "writes" is correct (Simple Present for third-person singular, habitual action).
    *   "know" is correct (Simple Present for first-person singular, habitual action).
    *   "is doing" is correct (Present Continuous for an ongoing action or current state that the speaker is unaware of).
    *   **This option correctly applies all the present tense rules.**

*   **Option 1: My daughter never wrote to me so I never knew what she do.**
    *   "wrote" is incorrect. "Never" implies a general truth/habit, not a specific past event. It should be "writes" (Simple Present).
    *   "knew" is incorrect. Similar to "wrote," it should be "know" (Simple Present).
    *   "do" is incorrect. "She do" is grammatically incorrect for a third-person singular subject in the present tense (it should be "she does" for Simple Present) and doesn't convey the ongoing nature implied by the context. It should be "is doing."

*   **Option 2: My daughter never write to me so I never knew what she does.**
    *   "write" is incorrect. For "My daughter" (third-person singular), it should be "writes" (Simple Present).
    *   "knew" is incorrect. It should be "know" (Simple Present).
    *   "does" is incorrect. While grammatically correct for "she" in Simple Present, the context "I never know what she (do)" implies an ongoing action or current state, making "is doing" more appropriate than "does" (which would imply a habitual action, which doesn't fit the "I don't know" context as well as "is doing").

*   **Option 4: My daughter never writes to me so I never knew what she does.**
    *   "writes" is correct.
    *   "knew" is incorrect. It should be "know" (Simple Present).
    *   "does" is incorrect. As explained for Option 2, "is doing" is more appropriate for the implied ongoing action/state.

Therefore, **Option 3** is the only one that correctly uses the appropriate present tenses for all three verbs in the sentence.