There's no formula, really. Just make sure the Subject (actor) is doing the Acting (verb). Watch out for verb forms of "to be"-- is, are, was, were, has, had, have, etc. If your sentence includes "by", it is likely passive voice. And passive sentences are longer than active sentences. You may need to substitute synonyms for some words. If you have leftover words when making an active sentence, they are likely unneeded.
She was walking to the store.
She walked to the store.
The ball was picked up by the boy.
The boy picked up the ball.
She is good at singing.
She sings well.
I have a sweater given to me by my grandmother.
My grandmother gave me a sweater.
For an LCD to work, each pixel must be energized to either let light through or block light out. The difference between active matrix and passive matrix displays is the way in which the pixels are electrically addressed, or "energized." Passive matrix flat panel displays consist of a grid of horizontal and vertical wires. At the intersection of each grid is an LCD element that constitutes a single pixel. Active matrix flat panels are a higher quality and more expensive type of display in which transistors are built into each pixel within the screen. For example, the 1600x1024 screen size requires over 14 million transistors, one for each red, green, and blue subpixel. Active matrix, sometimes also called TFT (thin film transistor) displays typically have higher resolution, higher contrast, and much faster pixel response rates than passive matrix LCDs
Basic Active Service Date is when you came into the military and swore in. For some that is about a week prior to Basic Training, for others, who were in the Delayed Entry Program, that can be months before basic training. PEBD is what finance uses to determine credible time you are getting paid for. I have 12 years of Active Federal Service but I am getting paid for 16 since I got out and went National Guard for four years. But this is only for pay purposes. The four years will not count for retirement unless there was active time in there.
0.75
the location of the active cell by its collumn letter and row number.
.6
huh?
To change an active sentence to passive, identify the object in the active sentence and make it the subject in the passive sentence. Move the subject of the active sentence to the phrase with "by" and change the verb to its past participle form. To change a passive sentence to active, identify the subject in the passive sentence and make it the subject in the active sentence. Use an appropriate active verb to describe the subject's action and add the original object of the passive sentence as the direct object in the active sentence.
This sentence is already in the passive. The verb is "BE + -ed" and there is no actor (who opened it?). The active version of this sentence is "Someone opened the parcel secretly."
The sentence "Sentences can be written in active and passive voices" is a declarative sentence written in passive voice.
active
The sentence "The pen was missing" is in passive voice, as the subject (the pen) is receiving the action (being missing) rather than performing it.
The sentence is passive.
The sentence "All of the clues were carefully hidden by your teacher" is a passive sentence because the subject ("all of the clues") is being acted upon by the verb ("were hidden").
This is not an active sentence so it cannot be changed to a passive sentence. Active sentences have a subject and a verb. eg The dog chased the cat. As a passive sentence -- The cat was chased.
The sentence is active. To make it passive, you would write "Lunchtime was announced by the noon whistle."
The mayor has given gifts to the pupils. -- active The pupils have been given gifts by the mayor -- passive Notice "the mayor" is the subject of the active sentence. In the passive sentence "the mayor' is the agent (by + agent). The object of the active sentence (the pupils) goes at the beginning of the passive sentence. The verb in the active sentence is present perfect, The passive form for present perfect is: have/has + been + past participle
The word decided is passive, because of the ed at the end, but if it was being used in a sentence, depending on how it was used in the sentence, it could be either active or passive. Hope that helps!