Final answer:
To complete the sentence in the past tense: Tina was blown away by the time he saw her again coaching.
Step-by-step explanation:
To complete the sentence correctly, we need to ensure that the verb tenses are consistent with the context of the sentence. The provided sentence appears to be in the past tense, so we should maintain that tense throughout. The correct completion of the sentence using the appropriate past tense verbs would be:
Tina was blown away by the time he saw her again coaching.
In this sentence, "was blown away" is the appropriate past tense form to indicate Tina's reaction. The verb "saw" is the simple past tense to describe the action that happened when he viewed her again. Lastly, "coaching" is a present participle that complements the verb "saw" to describe what he saw her doing, which further indicates the past continuous action.