They started to fight

他们开始争吵拉扯

start to 开始

例句：

There has been a busy start to polling in today's local elections.

今天地方选举的投票一开始就人头攒动。

I suggested that we start to taper off the counseling sessions.

我建议我们开始缩短咨询服务的时间。

Finches start to moult at around twelve weeks of age.

燕雀大约在12个星期大小的时候开始换羽毛。