It is important that he should attend every day.
他每天都要出席，这很重要。
The senator was invited but was unable to attend.
参议员受到了邀请，但是未能出席。
She agreed to attend but jibbed at making a speech.
她同意出席但不愿发言。
Please let us know if you cannot attend the meeting.
你若不能参加会议，请通知我们。