It is hard to catch birds an empty hand.

She fitted the clothes onand found them to be the exact size.

她把衣服试穿了,发现大小正合适. (动词不定式)

While she was wondering where to go , she met a policeman.

疑问副词where后跟不定式, 构成不定式短语.

It is more advisable to face the challenge than to escape.

前面是不定式.后面也应该不定式搭配.

After he had finished speaking , Mr Jones was made answer innumerabke questions.

本题是不定式的被动语态还原.

One that serves or appears at irregular intervals, especially a temporary worker.

'临时工'.''不定时服务或出现的人, 尤其指''.'临时工'. ''.

The sewing machine won't function well if you don't oil it regularly.

如果你不定时上油那台缝纫机就不好用.

It happened to be a chance coach that I had taken up.

我所坐的这辆车恰巧是个不定时的马车.

Match and combine them into sentences using the attributive clause.

用定语从句把他们组合在一起.

If you work hard , you are sure to succeed.

as作从属连词可引导多种状语从句.

In an adjective complement clause construction the clause occurs after an adjective.

在形容词补语从句中,从句跟在形容词后面.

He said ( that ) the APEC meeting would take place next week.

当从句动作发生在主句动作之后,从句要用过去将来时.

There is much water in the thermos.

但当不可数名词前有表示数量的复数名词时,谓语动词用复数形式.

These products have been steam distilled out.

(被动谓语组成部分)这些产物已由蒸汽蒸馏出.

Maintaining a healthy self-esteem is ( be ) a challenge that continues throughout life.

解析:一般现在时,动名词做主语,谓语动词用单数.

After supper, we often listen to the radio or watch TV.

晚饭后, 我们经常听广播或看电视.(连接两个谓语)

When I passed by his office , I found John reading something carefully.

分词作宾语补足语和主语补足语其实是同一成分用于两种不同的句式中.

Use is made of solar energy in heating houses.

双重定语引起的分隔.

The public buildings are equipped with air conditioning plants.

(动名词作定语)这些公共建筑物都设有空气调节装置.

Among all the metals iron is the most widely used engineering metal.

(定语)在所有金属中间,铁是最广泛使用的工程金属材料.

On heated, the two substances form a new compound.

(介词宾语)这两种物质一遇热就生成新的化合物.