To change the present simple sentence "She boils water for tea" into a past simple sentence, we need to follow these steps:
- The present simple tense of the verb "boils" suggests that the action is happening regularly or as a habitual action.
- The past simple tense, on the other hand, expresses an action that has been completed at some specific time in the past.
- To transform the verb from present to past simple tense, you add -ed to regular verbs, unless they are irregular verbs. The verb "boil" is a regular verb.
- In the past simple tense, "boil" becomes "boiled." Hence, the correct past simple sentence is: "She boiled water for tea."
This is consistent with the given answer option She boiled water for tea. Let's review the other options:
- Option: "She boil water for tea" - This is incorrect as it does not show the past tense.
- Option: "She is boiling water for tea" - This is present continuous tense, not past simple.
- Option: "She has boiled water for tea" - This is present perfect tense, which is also not correct for past simple.
Thus, the correct answer is She boiled water for tea.