speculate
v. 猜测，推测；投机
第三人称单数 speculates
现在分词 speculating
过去式 speculated
过去分词 speculated
例句
It is useless to speculate why he did it.
对他为什么这么做妄加猜测毫无用处。
《牛津词典》
It's always hard to speculate about the future.
推测未来总是很难的。
《柯林斯英汉双解大词典》
It's tempting to speculate about what might have happened.
大家不禁猜测，到底发生了什么事。
