简单动词、情态动词和助动词的顺序排列为:
情态动词+时态助动词/语态助动词+简单动词、情态动词+简单动词、助动词+简单动词。但是,需要注意以下几点:
1)情态动词后面一定是加上简单动词或者助动词的原形,如:① He can use the computer now. ② He should have taken the document.
2)否定形式是直接在情态动词后加not,若没有情态动词则在助动词后面接not,如:① I cannot answer your question at present. ② Tom’s novel has not been punished yet.
3)疑问形式是直接把情态动词提到句首,若没有情态动词则将助动词置于句首,如:① Can you speak Chinese ? ② Does she know some English?