“开始燃烧”可以表达为 "start to burn" 或 "begin to burn"。
这两个短语都清晰地传达了“开始”这一动作和“燃烧”这一状态。例如：
The fire started to burn.（火开始燃烧了。）
The fuel began to burn as soon as it was ignited.（燃料一点燃就开始燃烧了。）