助動詞片語:
will=be going to
can=be able to
msut= have to
You have to go to school on time. 你務必準時到學校。
1.had better +原形動詞 最好 (had並非為過去式時態,為助動詞)
否定式為had better not+原形動詞, had[ would) rather not+原形動詞
You had better not smoke. 你最好不要抽菸。
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