[知识点与例析]在解情态动词的题型时，从宏观上应先学习情态动词的共同特点：没有人称和数的变化，后接动词原形（不带to），不能单独做调语，可直接提前或加not构成疑问句、否定句等等，这对解题相当重要。情态动词，以笔者之见，“情”即察情况（依据情景、语境），“态”即 [Knowledge and analysis] When solving modality verbs, we should first learn the common characteristics of modal verbs in a macro: no change in the number and number, followed by the original verb (without to), can not be used alone , can be directly in advance or add not to form questions, negative sentences, etc., which is quite important for solving problems. Modal verbs, in the author’s opinion, “feel” the situation (based on context, context), “state”