英語文法ガイド 可能性のための助動詞: can/could
Modals for Possibility: can/could
機能 - can / could can 不定詞 は 能力 や、何かが 可能 または 許可されている ことを言うために使います。
Abilities 能力 Possibilities 可能性 Permissions 許可 英語文法 - can / could can 否定 は can't
can could
could 否定 は couldn't
can + INFINITIVE can + 不定詞 I can swim . cannot → can't He can't drive . Past simple: can → could You could go last year. could not → couldn't People couldn't fly 200 years ago. 例 - can SUBJ. can INF. ... I can swim 500m .You can get a 30 day visa .He can drive well .She can take 20 days off a year .We can meet at 3 .They can play outside .
例 - can't SUBJ. can't INF. ... I can't swim well .You can't get a 2 year visa .He can't drive well .She can't take 6 months off a year .We can't meet at 3 .They can't play in the street .
例 - could SUBJ. could INF. ... TIME PHRASE I could swim 50m last year. You could buy them 5 years ago. He could sing it yesterday. She could run 10km last year. We could see it yesterday. They could play here 50 years ago.
例 - couldn't SUBJ. couldn't INF. ... TIME PHRASE I couldn't swim well before. You couldn't buy them last year. He couldn't sing it last week. She couldn't relax at all last month. We couldn't see it yesterday. They couldn't buy phones 200 years ago.
英語文法 - CAN : Yes/No 疑問文 ➤ Yes / No Can could 主語 の前に来ます。
はい／ いいえ で答えられるクローズドクエスチョン では、短い答えには動詞can
Can /Could + SUBJECT + INFINITIVE ... ?Can /Could + 主語 + 不定詞 ... ?Yes, + SUBJECT + can . No, + SUBJECT + can't . Yes, + SUBJECT + could . No, + SUBJECT + couldn't . 例 - CAN : Yes/No 疑問文 ➤ Yes / No CAN S. ... Y /N S. CAN Can you swim well? ➤ Yes, I can .Can you sing well? ➤ No, I can't .Could you help earlier? ➤ Yes, I could .Could you go earlier? ➤ No, I couldn't .
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