We form the perfect tenses by using the verb *to have* as an auxiliary verb and adding the past participle of the main verb. For example we form the present-perfect tense by using the present tense of have (has or have) and adding the past participle of the main verb.
Those helping verbs are named *auxiliary verbs* . And the common ones are to be, to have, and to do. They appear in the following forms:
To Be: am, is, are, was, were, being, been, will be
To Have: has, have, had, having, will have
To Do: does, do, did, will do
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Answer: Environmental degradation
Explanation: Environmental degradation is the deterioration of the environment through depletion of resources such as quality of air, water and soil; the destruction of ecosystems; habitat destruction; the extinction of wildlife; and pollution.
Answer:
Inside the mitochondrion is a certain type of DNA. That's different in a way from the DNA that's in the nucleus. This DNA is small and circular. Mitochondrial DNA, unlike nuclear DNA, is inherited from the mother, while nuclear DNA is inherited from both parents.
Explanation:
Answer:
B. abcb....to find the rhyme scheme of a poem lable every new ending sound with a new letter
