一般现在时

The story is great. I think Sherlock is a genius.

如果你是做出评价的话，一般用现在时。

The relationship between blood pressure and blood viscosity in vive from 566 cases of old people at the age of over 60 was studied using Model XG-2BloodCirculation Function Monitorinorder to investigate the effect of blood pressure on blood viscosity in vivo.

这段摘要也是通报性的采用现在时。这是当前英语文摘的主要形式。资料性文摘一般包括：(1)研究目的背景等的介绍；(2)研究过程方法和结果的介绍；(3)结论；(4)对未来的展望。

The relationship between blood pressure and blood viscosity in vive from 566 cases of old people at the age of over 60 was studied using Model XG-2BloodCirculation Function Monitor,inorder to investigate the effect of blood pressure on blood viscosity in vivo.

这段摘要也是通报性的，采用现在时。这是当前英语文摘的主要形式。资料性文摘一般包括：(1)研究目的，背景等的介绍；(2)研究过程，方法和结果的介绍；(3)结论；(4)对未来的展望。

Now watch me, I switch on the current and stand back.

表示正在进行的动作的客观状况，所以后句用一般现在时。

Now watch me, I switch on the current and stand back.

第一句用一般现在时，用于操作演示或指导说明的示范性动作，表示言行的瞬间动作。

Scientists say that seventy-four different kinds of living things go extinct every day.

科学家说，每天有74种不同种类的生物灭绝。（主、从句都用了一般现在时。

There is an aeroplane flying over the bridge.

复习usually在一般现在时中的使用。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。