How do verbs become nouns in English? How do nouns become verbs?

Verbs become nouns:

1 、+er(r)

Cleaners, sellers, players, surfers, singers, owners, jumpers, speakers, travelers, teachers and workers?

2,+or

Tourists, inventors, conductors, inspectors, actors,

3、+ing

Crossing-crossing, cleaning-cleaning, meeting-meeting, park-parking.

Extended data:

First, adjectives become adverbs.

Very useful, extensive, strong,

2, change y to add ly, healthy, heavy, happy, lucky, noisy,

Ok-how about it?

Terrible-very terrible?

Maybe-probably

Second, adjectives and adverbs are homographs.

Early, enough, fast, far, first, difficult, high, late, many, right, straight,

Third, change the negative.

Unfortunately, unknown, different, unhappy, unusual, unfriendly,

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