（尤当 has 为助动词时，he is 或 he has 的常用口语形式）He's is the usual spoken form of 'he is' or 'he has', especially when 'has' is an auxiliary verb. （尤当 has 为助动词时，he is 或 he has 的常用口语形式）
He's working maybe twenty-five hours a week.
他一周工作大概25个小时。
From day one he's been a great asset to the company.