were formed after the reaction vs have formed after the reaction

Both phrases are correct, but they are used in different contexts. 'Were formed after the reaction' is used to describe a past event that happened after a reaction took place. 'Have formed after the reaction' is used to indicate a more recent event that has occurred after a reaction. The choice between the two depends on the specific timeline you want to convey.

Last updated: April 01, 2024 • 586 views

This phrase is correct and commonly used to describe events that occurred after a reaction in the past.

"were formed after the reaction"

This phrase is used to talk about events that took place after a reaction in the past. It indicates a sequence of events where the formation happened after the reaction.

Show examples from the web [+]

evidence that the reaction products of the contaminant, formed after the performance of the detoxification process, do not endanger animal and public health and the environment;
Poland, a country that itself was once knocking on the EU's door, is now calling for the opportunity of membership to be offered to Ukraine and other countries that were formed after the collapse of the USSR.
According to a legend, the Plitvice lakes were formed after a major drought, when people, animals and plants were longing for water.
Te present-day town square was formed after the castle was destroyed in 1808.
People think these holes were all formed after the last ice age.
This system allows to eliminate the excess material formed after the welding of the profile.
The planets that have been found... must have formed after the supernova explosion.
The high therapeutic value of this association, the only of its kind in Europe, is due to the quality of the extracted sea mud, rich in organic iodine and zinc, that were formed after centuries of saltpan activity.
SIEF A forum, formed after the pre-registration phase, to share data on a given phase-in substance.
The inner pit with the new lava lake formed after the 2002 lateral eruption (fisheye lens).
They're what's left over from the creation of the solar system after the planets were formed billions of years ago.
Even after the earthquake Kobe Ban spoke in 1995 designing fifty houses for the displaced Vietnamese. The bases were formed from beer crates full of sand thus avoiding concrete foundations.
Legend has it that the lakes were formed after a huge meteorite fall, and its mysterious waters are able to heal. It is believed that the man who swims in all five lakes enjoy health and wealth.
Even though a new government has been formed after the recent parliamentary elections, responsibility for environmental matters remains with the combined Ministry for the Environment, Physical Planning and Public Works.
A positive signal today will give the new Slovenian Government which is to be formed after the 10 November elections even more encouragement to meet future challenges, especially in the framework of the national accession strategy, with equal success.
5. This Article shall apply mutatis mutandis to undertakings formed after the date of notification of this Directive which take over business already conducted on that date by a legally distinct body.
The European air transport sector was made to suffer disruptions for over a week as a result of the cloud of ash formed after the volcanic eruption in Iceland.
The company has expressed the auspice that the new Greek government, that he will be formed after the elections of next Sunday, resolves the problem in its entirety.
When a Premonstratensian left the monastery to follow the Czech National Church formed after the separation from Rome which had just occurred, Jakob Kern discovered his vocation in this sad event.
As you know, after the big bang, in space there were only hydrogen and helium. It was in the stars that all the remaining chemical elements were formed.

Alternatives:

were created after the reaction
came into existence after the reaction
took shape after the reaction
emerged after the reaction
developed after the reaction

This phrase is correct and commonly used to describe events that have occurred more recently after a reaction.

"have formed after the reaction"

This phrase is used to talk about events that have taken place more recently after a reaction. It indicates a connection between the reaction and the formation that is still relevant.

Show examples from the web [+]

The planets that have been found... must have formed after the supernova explosion.
evidence that the reaction products of the contaminant, formed after the performance of the detoxification process, do not endanger animal and public health and the environment;
Te present-day town square was formed after the castle was destroyed in 1808.
People think these holes were all formed after the last ice age.
This system allows to eliminate the excess material formed after the welding of the profile.
SIEF A forum, formed after the pre-registration phase, to share data on a given phase-in substance.
The inner pit with the new lava lake formed after the 2002 lateral eruption (fisheye lens).
Even though a new government has been formed after the recent parliamentary elections, responsibility for environmental matters remains with the combined Ministry for the Environment, Physical Planning and Public Works.
A positive signal today will give the new Slovenian Government which is to be formed after the 10 November elections even more encouragement to meet future challenges, especially in the framework of the national accession strategy, with equal success.
5. This Article shall apply mutatis mutandis to undertakings formed after the date of notification of this Directive which take over business already conducted on that date by a legally distinct body.
The European air transport sector was made to suffer disruptions for over a week as a result of the cloud of ash formed after the volcanic eruption in Iceland.
The company has expressed the auspice that the new Greek government, that he will be formed after the elections of next Sunday, resolves the problem in its entirety.
When a Premonstratensian left the monastery to follow the Czech National Church formed after the separation from Rome which had just occurred, Jakob Kern discovered his vocation in this sad event.
Undertakings formed after the dates referred to in Article 18(3) should not be authorised to carry on life assurance and non-life insurance activities simultaneously.
By the way: each crater in the field, which was formed after the impact of air bomb during the World War, created in the field highly accurate circular crater.
Beyond the museum an interesting element is the Covolo: a huge well, 83 metres deep and very charming, formed after the collapse of a cavern whose calcareous rocks were eroded by water: a typical karst phenomenon.
The PM confirmed that a union of Serb municipalities in northern Kosmet will be formed after the local elections in autumn, but that Kosmet Serbs will not be abandoned meanwhile.
Whether you have a group of two men in partnership or an entire nation which is being formed after the conquest of land from another race-it does not matter the size of the group-they enter into certain agreements.
The interposition of the states, rapidly formed after the victory over Germany and Austria, had created a buffer between red Russia and Berlin, Budapest and Munich strongholds, fallen without the chance of getting any help.
His political program was formed after the model of English politician and philosopher John Stewart Mill, whose book "On Freedom" he translated into Serbian in early 1868 and printed it in Vienna with his own preface.

Alternatives:

have been created after the reaction
have come into existence after the reaction
have taken shape after the reaction
have emerged after the reaction
have developed after the reaction

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were formed after the reaction vs have formed after the reaction