常用词语结构有：

be certain / sure / confident of + NP 确信，深信

be certain / sure / confident + that … 确信，深信……

be certain / sure / + to V 一定（必会）会……

be convinced of + NP / that … 相信……

believe + that … 相信，认为……

have / there is no doubt + that … 毫无疑问……

know for a certainty + that … 确实知道……

it can be said with certainty + that 可以断言……

it is clear / certain + that … 显然……/可以肯定……

it is sb.’s belief / opinion + that … 某人认为/某人的看法是……

He is certain that this television will operate on batteries .

他确信这台电视机能靠电池组来工作。

Why does the scientist feel so certain of the existence of electrons?

为什么科学家如此确信电子的存在？

The above mentioned reactions are certain to proceed smoothly .

上述的这些反应一定平稳地进行。

He was convinced that inexpensive ice would open the way to better health and living .

他相信，廉价的冰将为更好的健康和生活开辟道路。

We believe that atomic weapons made by man will certainly be eliminated by man in the end .

我们相信人类所制造的原子武器最终肯定会被人类所销毁。

There is no doubt that solar-energy house is successful .

毫无疑问，太阳能住房是成功的。

It is certain that air travel will increase enormously .

可以肯定，航空旅行将会得到巨大的发展。

It is clear that rotating objects can also accelerate .

显然，旋转的物体也会加速。

It is our belief that a full understanding of … can be obtained only after …

我们认为，只有……之后才能充分理解……

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