Watch the video. Then go to the Tasks and do the activities.
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Hi bakh.sh85,
I'm afraid we don't provide explanations or answers for tasks from elsewhere. We're happy to explain the answers to our own questions and tasks, of course.
Peter
The LearnEnglish Team
Hi fabien.bertho,
Modal verbs (such as 'might') can be followed by 'have' + past participle -- in these cases, 'have' does not change form. You can read more about this on our modals with 'have' page.
Could you please give an example of what you mean in your second question? I'm afraid I don't understand exactly what you mean.
Best wishes,
Kirk
The LearnEnglish Team
Hello quoc hung,
Since Ashlie and Stephen are already investigating the crime when she says this, the continuous form is the best form here.
All the best,
Kirk
The LearnEnglish Team