To complete the sentence "I am thankful for his ......... in time," we need to choose the appropriate form of the verb to express gratitude for someone's timely action. Let's break down the options:
1. "come" - This is the base form of the verb and can be used as an infinitive or a bare infinitive. In this context, it does not fit the sentence structure correctly.
2. "to come" - This is the full infinitive form of the verb. It is used to show purpose or intention. In this sentence, it can work: "I am thankful for his to come in time."
3. "coming" - This is the present participle form of the verb. It is often used to show continuous action. In this sentence, it doesn't fit well.
4. "have come" - This is the present perfect form of the verb. It indicates a completed action that has relevance to the present. In this sentence, it doesn't fit the intended meaning.
Therefore, the most appropriate choice to complete the sentence is: "I am thankful for his to come in time."
