become什么时候是动词什么时候是副词。谢谢各位了！！

v.1. 变成,成为,转为,变得〔后接名词、形容词和分词等述语〕
When a high-cost importing country becomes an exporter, potential gains from trade are wasted.
当成本高的进口国成为出口国后,贸易的潜在利益也就被浪费了。

2. 适宜,适合,适于;与…相称,与…相当
It does not become a senior pupil to cause all this trouble.
一个高年级学生不宜惹这些麻烦。

3. 发生,产生
4. 做;沦为,转为;当上,出任,升任
Rather than becoming a prisoner he shot himself.
他不愿做俘虏,开枪自杀。

5. 趋于,趋近,日趋,渐渐,渐渐…起来
That morning Israel's strategy also became clear.
那天上午,以色列的战略也趋于明朗。

只有动词,很少情况下会做连词,没有副词