The lizard can reach a lenghth of three metres when ___答案是fully grown为什么不是 having fully grown？]从语法角度讲 谢谢
热心网友
The lizard can reach a lenghth of three metres when ___答案是fully grown完全长成形的（形容词=be fully grown),又如： Deer antler growth usually begins during the month of March or April, by August or early September antlers are fully-grown. 鹿角的生长通常始于（每年的）3月或4月，到了8月或者9月初，鹿角就完全长成形了。have grown是在作为“种植时”的用法。“生长”一般用be grown.