is known to affect vs has been known to affect

Both phrases are correct, but they are used in slightly different contexts. "Is known to affect" is used to state a general fact or truth, while "has been known to affect" is used to indicate a specific past action or event.

Last updated: March 29, 2024 • 945 views

is known to affect

This phrase is correct and commonly used in English to state a general fact or truth.

This phrase is used to indicate that something is recognized or acknowledged to have an effect on something else.

Examples:

Smoking is known to affect your health.
Lack of sleep is known to affect cognitive function.
Excessive sugar consumption is known to affect your weight.
Climate change is known to affect global weather patterns.
Stress is known to affect mental health.

Show examples from the web [+]

Glycosylation of other proteins is known to affect their stability, activity, biodistribution, and half-life in blood.
Now, massive disturbance at this scale is known to affect hydrological cycles, degrade wildlife habitat, and emit greenhouse gases back into the atmosphere, which creates more disturbance and more tree diebacks.
Some bedding materials may contain naturally occurring oestrogenic or antioestrogenic chemicals (e.g. corn cob is known to affects the cyclicity of rats and appears to be antioestrogenic).
The disease is known mainly to affect sub-Saharan Africa and is associated with extreme poverty.
OSSEOR is not known to affect your ability to drive or use machines.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
- If you are taking medicine known to affect the liver.
There are lots of different proteins that are known to affect aging.
It's been known to affect the limbic system.
It's known to affect the neurotransmitters in animals' brains.
Patients taking medicinal products known to affect blood pressure or cardiac function should be closely monitored during treatment with clofarabine (see sections 4.4 and 4.8).
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
I mean, a virus in the myelin sheath has been known to affect the forebrain and cause group hallucinations.
There are some viral strains of the psittacosis- lymphogranuloma venereum group that have been known to affect bone.
I mean, a virus in the myelin sheath has been known to affect the forebrain and cause group hallucinations.
ori factors which are known to affect response rates.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
factors which are known to affect response rates.
factors which are known to affect response rates.

Alternatives:

is understood to affect
is recognized to affect
is acknowledged to affect
is believed to affect
is proven to affect

has been known to affect

This phrase is correct and commonly used in English to indicate a specific past action or event.

This phrase is used to indicate that something was recognized or acknowledged to have had an effect on something else in the past.

Examples:

The new medication has been known to affect patients differently.
The chemical spill has been known to affect the local wildlife.
Her leadership style has been known to affect team morale.
The economic downturn has been known to affect consumer spending.
The policy change has been known to affect company profits.

Show examples from the web [+]

I mean, a virus in the myelin sheath has been known to affect the forebrain and cause group hallucinations.
I mean, a virus in the myelin sheath has been known to affect the forebrain and cause group hallucinations.
As VFEND has been known to affect the liver and the kidney, your doctor should monitor the function of your liver and kidney by doing blood tests.
As VFEND has been known to affect the liver and the kidney, your doctor should monitor the function of your liver and kidney by doing blood tests.
For instance, in the UK, swayback is a disease which has long been known to affect sheep, and the link between this disease and copper deficiency has been demonstrated in several countries.
It's been known to affect the limbic system.
There are some viral strains of the psittacosis- lymphogranuloma venereum group that have been known to affect bone.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
- If you are taking medicine known to affect the liver.
There are lots of different proteins that are known to affect aging.
It's known to affect the neurotransmitters in animals' brains.
Patients taking medicinal products known to affect blood pressure or cardiac function should be closely monitored during treatment with clofarabine (see sections 4.4 and 4.8).
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
ori factors which are known to affect response rates.
HCV genotype and baseline virus load are prognostic factors which are known to affect response rates.
factors which are known to affect response rates.
factors which are known to affect response rates.
Sibutramine should, therefore, be used with caution in patients predisposed to bleeding events and those taking concomitant medications known to affect haemostasis or platelet function.
Glycosylation of other proteins is known to affect their stability, activity, biodistribution, and half-life in blood.

Alternatives:

has been understood to affect
has been recognized to affect
has been acknowledged to affect
has been believed to affect
has been proven to affect

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is known to affect vs has been known to affect