Hello, SSY Jung—and welcome to English Forums. SSY Jung "I couldn't see Mr. "Is it also right if I use "so" instead of "too"?
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SSY Jung"I couldn't see Mr. Sam, who was too/so busy today."Is it also right if I use "so" instead of "too"?Only in informal English. Formally, 'so' requires a subsequent 'that', hence a different sentence: Sam was so busy today that I couldn't see him.