When the Feast was already half over, Jesus went up into the temple [court] and began to teach.
Now about the midst of the feast Jesus went up into the temple, and taught.
But when it was now the midst of the feast Jesus went up into the temple, and taught.
Halfway through the festival, Jesus went up to the temple and started to teach.
Then, about the middle of the feast, Jesus ascended into the temple, and he was teaching.