Complete the sentences with the correct form of the verb. Explain the grammar rule for each choice.

Here are the completed sentences:

1. He said he would come on time.

   • "Would" is used here to express a future action from a past perspective (reported speech) or a willingness.

2. He walked from the stadium to the bus.

   • "Walked" is the past tense, indicating a completed action.

3. Or can I help you?

   • "Can" is used to ask if one is able to help or to offer assistance.

4. I am not sure but I don't think so.

   • "Am" is the correct present tense form of "to be"