Can't. Can't is often used when we think that something is impossible at the present moment. "Helen can't be in Spain because I saw her driving past my house this morning." Can't have + past participle Can't have + past participle is used when we are sure that something did not happen in the past. "He can't have been at the meeting, he's on a business trip this week." bvduimed https://bvduimed.wordpress.com/2011/10/13/how-can-i-have/ https://bvduimed.wordpress.com/2011/10/13/how-can-i-have/#respond Thu, … Manage YouTube channels - YouTube Help
Have - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary
How to determine when to use had, have, had been, etc
Introduction We use the modal verbs "must have", "can't have" and "might have" to make guesses or deductions about an action in the past that we believe has definitely happened, has definitely not happened or possibly happened, based on our knowledge, information or evidence, or lack of it.
May 02, 2019 Teams can have standard or private channels - Office Support Tenant owners can change this permission and limit channel creation and permissions to certain roles. Private channels. They’re for discussions that shouldn’t be open to all members, so you must be invited to join one to view it within a team. By default, any team owner or team member can create a private channel and add members. “Can I get” vs. “May I have” - Pain in the English