Final answer:
To change verbs ending in a consonant followed by 'y' to the past tense, we replace the 'y' with 'i' and add '-ed'. The verbs rely, mystify, hurry, petrify, and worry change to relied, mystified, hurried, petrified, and worried respectively.
Step-by-step explanation:
The student is asked to change verbs in parentheses to the past tense by adding the suffix -ied. Let's go through each sentence and apply the rule:
- In the horror story, the main character relied on her brother for help.
- She was mystified when her calls to him were not answered.
- She hurried to check that all her house doors were securely locked.
- She was petrified when she thought she saw someone looking in the window.
- Now she was worried that her brother would not show up to help her.
It is important to note the change from present to past tense when a verb ends with a 'y' preceded by a consonant; we change the 'y' to 'i' before adding -ed.