質問: までには usage a 「すみません、山田さんはどうですか。」 b 「山田さんは会議中ですが、会議は一時半までには終わると思いますよ。」 i don't understand the usage of までには in this example. why did は appear twice "会議は。。。までには" and would に be necessary as with まで alone we could understand the meaning of the sentence?
回答: in this case, 会議は一時半まで終わると思います isn't correct, it should be 一時半までに and adding は emphasizes the time like "at least until at 1:30". *you can say 会議は一時半まで続きます / かかります, it means "the meeting will be continued until at 1:30" in the literal translation. i hope my english isn't bad and this helps you.