Past tense: traveling/traveled; Past participle: travelled/travelled. Other morphological changes: the current participle is traveling/traveling. Example: I have travelled through Europe.
Usage of travel
Usage of travel: 1. The basic meaning of travel is to walk, drive, travel, travel, walk through, and bypass an area. Extension can mean "recall". It can also mean "(be) spread", "transport", "go out to promote or tour business".
Usage of travel 2: travel can be used as an intransitive verb or a transitive verb. When used as a transitive verb, it takes nouns and pronouns as objects. It can be used for passive structures.
Usage 3 of travel: When it means to travel by a certain means of transportation, the preposition by, in or on+means of transportation can be followed by travel.
Usage of travel 4: travel can also refer to "moving quickly" and is used as an intransitive verb.
Usage of travel 5: The basic meaning of travel is "walk, travel", which can be extended to "travel, travel". It refers to many trips a person has taken to different places, especially a long period of overseas travel. Travel generally refers to travel, which is used as uncountable noun without indefinite article; If it refers to a long time travel that has been to many places, it is often used in the plural form of travels.
Usage of travel 6: travel can refer to "travel notes, travel notes", usually in the plural, but not modified by many or numbers.
Usage of travel 7: travel also means "a group of passengers".