Using an active voice for the majority of your sentences makes your meaning clear for readers, and keeps the sentences from becoming too complicated or wordy. Passive voice makes sentences wordier and can cloud the meaning of your sentence.
In these examples the use of passive voice can be replaced by active voice by removing extra words like 'been' and re-arranging the sentence structure.
Here are the rewritten sentences:
<em>The thieves have been arrested by the police.</em>
Remove 'been' and 'by' then switch 'police' with 'thieves'.
The police have arrested the thieves.
<em>The marvelous performance delivered by the children enthralled us.</em>
Remove 'delivered by the children'
The marvelous performance enthralled us.
<em>He has been invited to their party.</em>
Remove 'he has' replace with 'they have'
They have invited him to their party.
<em>We have shipped your order.</em>
Simplify the sentence to only have a verb and a subject.
The order has shipped.
<em>The girl recited the poem beautifully.</em>
Replace 'The girl' with 'she'
She recited the poem beautifully.
