However, for many years physicists thought that atoms and molecules always were much more likely to emit light spontaneously and that stimulated emission thus always would be much weaker.
1. however 副词,做状语,丢到一边
2. for many years 介词短语作状语,位置很灵活,还好放在开头,容易判断,怎么样,丢到一边。
3. physicists物理学就,名词出现,估计是主语。
4. thought 是一个实意动词,那么实意动词后面有个that,接宾语从句,划上一个左括号了,后面是完整的还是非完整的? 完整的,那么就按照完整的规则去找这个宾语从句的结束点。
5. atoms and molecules是名词的并列,那么就是从句的主语吧
6. were系动词,谓语出来了。后面much more likely to emit light spontaneously句子完整了没有,完整了,是不是划上一个右括号,…..别着急吧,spontaneously and后面如果还是一个副词,那不仍然是做一个并列的副词成为这个句子的状语,所以先别着急,看看and后面是什么成分,是个that,好了,我们知道这个that应该是和前面的那个that并列共同作为thought的宾语,引导宾语从句。那么我们这个时候再在spontaneously后面划上一个右括号吧。表示第一个从句的结构完整了。而在and后面划上一个左括号,表示开始另一个结构层次的划分。
It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through the Western world since the time of the Industrial Revolution.
1. It appeared that,属于我们前面所讲的第一种情况,动词后接that,而这里的appear不是实意动词,而相当于系动词,这里是一个表语从句了
2. 判断出是表语从句,那后面的that引导的是完整的还是非完整的,按照完整结构来划分,先划个括号
3. Canada 作主语,后面是一个系动词,系动词后面可以接形容词作表语,介词短语,the book is on the desk或者动词的ing形式,或者动词的被动语态,还有副词吧,但是是特定的here there作表语,I am here . 而这个地方跟的是once more 是一个副词,但又不是我们说的here there 所以不是表语,而是作状语吧,拿到一边,falling 过去进行时了吧。而且是falling in step with 词组,落入一个步伐,一种趋势。