Final answer:
To convert the sentence 'I like to fly a kite in the field' to past tense, we simply change the verb 'like' to 'liked'. Hence, the sentence would be 'I liked to fly a kite in the field'.
Step-by-step explanation:
The sentence 'I like to fly kite in the field' expressed in past tense would be 'I liked to fly a kite in the field'. In this case, we are changing the verb 'like' to its past tense form, 'liked'. This is a simple and straightforward conversion, where the tense of the action is changed to show that it happened in the past.
Learn more about Past Tense