He said army officers had threatened to destroy the town. [VERB to-infinitive]

他说陆军军官们曾威胁要摧毁那座小镇。

He tied her up and threatened her with a six-inch knife. [VERB noun + with]

他把她捆起来，拿着一把 6 英寸长的刀子威胁她。

If you threaten me or use any force, I shall inform the police. [VERB noun]

你要是威胁我或是动武，我就报警。

The newcomers directly threaten the livelihood of the established workers. [VERB noun]

新来的工人直接威胁到老工人的饭碗。

The unity of our society is threatened by troublesome and restless minorities. [VERB noun]

我们社会的团结遭到了一小撮滋扰生事、不安分守己的群体的威胁。

30 percent of reptiles, birds, and fish are currently threatened with extinction. [be VERB-ed + with]

目前，30% 的爬行动物、鸟类和鱼类面临灭绝的危险。

The fighting is threatening to turn into full-scale war. [VERB to-infinitive]

这场战斗有可能会演变为全面的战争。

Plants must be covered with a leaf-mould or similarly protected if frost threatens. [VERB]

如果霜冻来临，植物必须盖上腐叶土或用类似方法加以保护。