"We became concerned about him when he was ready for junior high," says his father.

“他准备上高中时我们都很为他担心，”他父亲说。

youdao

We became concerned because we had the club upstairs.

WSJ: Brighter Lights for Town Hall

And again, as we saw the track of the storm adjust we repositioned teams and we became increasingly concerned about possible impacts in the New England states.

WHITEHOUSE: Press Briefing

Tim Berners-Lee, who is credited with much off the early innovation that became the web, says that we should be very concerned about the threats to the open web.

FORBES: Why Rain Works for SXSW