她本来可以去参加聚会的，但她决定待在家里。
She could have gone to the party, but she decided to stay home.
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Could英 /kʊd/|美 /kʊd/
解释
could + have + gone 表示与过去事实相反的假设（本可以去但实际没去）。but 后的交代说明实际发生了相反的情况。
She could have gone to the party, but she decided to stay home.
could + have + gone 表示与过去事实相反的假设（本可以去但实际没去）。but 后的交代说明实际发生了相反的情况。