[誤]He'll be here tomorrow from about seven o'clock.

・「~から」という時間に関して言う場合、"from"は単独で使えない。

[誤]He'll be here tomorrow from about seven o'clock.
[正]He'll be here tomorrow from about seven o'clock onward.
[誤]I work from 9 every day.
[正]I work from 9 to 6 every day.
[誤]I will only be working in the afternoons from now.
[正]I will only be working in the afternoons from now on.
[誤]I will only be working in the afternoons from today.
[正]I will only be working in the afternoons from today on.

・「~から」と時間に関して言う場合の言い方。
[正]He'll be here starting at 7:00.
[正]He'll be here as of 7:00.

・場所に関しては、"from"が単独で使える。
[正]We took the train from Osaka.

[誤]He'll be here tomorrow from about seven o'clock.の関連項目