問題文全文(内容文)：
3-3の解説動画です。人称代名詞（we, theyなど）について解説しています。

問題文全文(内容文)：
分詞構文の説明動画です

問題文全文(内容文)：
I saw him enter the room.を受動態にする

問題文全文(内容文)：
「no＋名詞」の場合、名詞は単数形か複数形どちらが適しているのでしょうか。

状況別に分けて、解説します。

問題文全文(内容文)：
【問】
The Earth has been around for approximately 4.5 billion years.

【問】
The train ( ) when I reached the platform, so I didn't have to wait in the cold.
① had already arrived
② has already arrived
③ previously arrived
④ previously arrives
(センター)

【問】
He asked me what I ( ) studied in the morning.
① did
② had
③ have
④ was
(青学)

【問】
Naomi ( ) reading the Bible before everyone else was only halfway through.
(1) had finished
(2) have finished
(3) has finished
(4) will finish
(青学)

【問】
It's our wedding anniversary next Tuesday, and by then we ( ) married for ten years.
① are
② will have
③ will have been
④ would have
(センター)

【問】
I heard you ( ) haven't finished your report. The teacher is going to be very angry.
① already
② so far
③ still
④ yet
(センター)