虚拟语气：与事实相反的信号词

Marketers have embraced the two-step flow because it suggests that if they can just find and influence the influentials, those select people will do most of the work for them.

主干Marketers have embraced the two-step flow because it suggests that those select people will do most of the work for them.

营销人员接受了两级传播，因为这表明如果他们能找到并影响有影响力的人，那些被挑选出的人将为他们完成大部分工作。

看点suggests在此意为“表明”，主语it指代理论，后接陈述语气从句，if条件句+will do是真实条件，非虚拟。

And the demand that rose in those societies for entry to higher education extended to groups and social classes that had not thought of attending a university before the war.

主干And the demand extended to groups and social classes.

并且那些社会中接受高等教育的需求，延伸到了战前未曾想过上大学的群体和社会阶层。

看点demand是名词，that rose是定语从句，不触发虚拟语气；had not thought是过去完成时陈述语气。

Peter Lissaman, an aeronautics expert who was formerly at Caltech and the University of Southern California, has suggested that a formation of 25 birds might enjoy a range increase of 71%.

主干Peter Lissaman has suggested that a formation of 25 birds might enjoy a range increase of 71%.

航空专家彼得·利斯曼曾指出，由25只鸟组成的编队可能会将飞行范围增加71%。

看点suggested主语是人，但结合语境意为“指出/表明”，后接might enjoy陈述语气，非should do虚拟。

Nature’s poll findings suggest that this trend is as strong as ever, but, tomake a collaboration work, both sides need to invest time, and embrace surprise and challenge.

主干Nature’s poll findings suggest that this trend is as strong as ever.

《自然》杂志的民意调查结果表明，这一趋势一如既往地强劲。

看点findings作主语，suggest只能是“表明”，that后is是现在时陈述语气，绝非虚拟。

A new study published in the journal Child Development, by Eveline Crone of the University of Leiden and colleagues, suggests that the positive and negative sides of teenagers go hand in hand.

主干A new study suggests that the positive and negative sides of teenagers go hand in hand.

莱顿大学的一项新研究表明，青少年的积极和消极面是相伴而生的。

看点study作主语，suggests意为“表明”，that后go是一般现在时陈述语气，不触发虚拟。

The most famous of these efforts was initiated by Noam Chomsky, who suggested that humans are born with an innate language-acquisition capacity that dictates a universal grammar.

主干The most famous of these efforts was initiated by Noam Chomsky, who suggested that humans are born with an innate language-acquisition capacity.

其中最著名的尝试由诺姆·乔姆斯基发起，他指出人类天生具有内在的语言习得能力。

看点suggested意为“指出/认为”，后接are born陈述语气，capacity后that dictates也是定语从句。