The men walking in front were carrying flags.

走在前面的人打着一面旗子。

youdao

The man walking in front was carrying a flag.

走在前面的人打着一面旗子。

youdao

While I was on my way to the law office at noon, the girl who was walking in front of me suddenly fainted because of the heat.

今天中午在我去律师事务所的路上，那个走在我前面的女孩子由于天太热而突然晕倒了。

youdao

The blind man is walking in front of a car and you do not have a duty to stop him absent some relation between you.

MSN: Health insurers seek to soften their image

Scott Davis, 49, who was shot but survived his wounds, told the court during the trial how he had heard the click of a gun while walking in front of Beasley at the farm.

BBC: Richard Beasley in court in Akron, Ohio 26 March 2013

So, when it came to Lib Dem leader Charles Kennedy's turn, he was treated to the usual discourtesy of dozens of backbenchers walking out in front of him.

BBC: Howard boosts Tory spirits