Question

c) He suddenly realized that he
(travel) in the wrong direction,​

Answer 1

Answer:

He suddenly realized that he was traveling in the wrong direction.

Explanation:

• Verb -Verbs are words that describe an action, an occurrence, or a state of being . There must be a verb in almost every sentence. The infinitive is a verb's fundamental form.

• Even when a person is only existing, verbs convey what they are thinking or experiencing.

• Additionally, the only word type that is definitely required to form a sentence is a verb. Even nouns, which denote things, are not required to appear in every sentence.

Here the sentence is in past tense.

So, we use  was + traveling.

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Answer 2

Complete question:

Since the part of the question is missing, you might be referring to the following question:

c) He suddenly realized that he (travel) in the wrong direction. ​Write the correct form of the verb.

Answer:

"was travelling"

Explanation:

• Verbs are the important parts of speech which act as direct, vigorous communicators.
• In English grammar, tense is a category that expresses time reference.
• Tenses are usually manifested by the use of specific forms of verbs, particularly in their conjugation forms.
• Using a chosen verb tense consistently throughout the same demonstrates its mood, time frame and attitude with respect to the action.
• Most English verbs exist in five forms: walk (the base form), walks (the third-person singular present), walked (the simple past), walking (the present participle), and walked (the past participle).

• For regular verbs, like walk, the simple past and the past participle forms are the same.
• For irregular verbs, the simple past and past participle are usually different: sing (the base form), sings (the third-person singular present), sang (the simple past), singing (the present participle), and sung (the past participle).

• The correct form of the verbs depends on the context and is accordingly expressed by the tense.
• When you combine a verb with a form of "to be", you typically need an -ed or -ing form. When you combine a verb with a modal like can or should, you typically need the base form.
• When an action in the past overlaps with another action or a time, we use past progressive tense to denote the longer action and past simple for the shorter action.    
• It is important to remember that the action in the past continuous starts before and often continues after the other shorter action or time. For instance, I was walking to my hostel when I met Jenny. ("I" started walking before I met Jenny, and maybe "I" continued afterwards.)

• Since we can notice the overlapping of two actions, we will use past continuous or progressive tense for the longer action.

Therefore, the correct form of the verb to be used here would be-

"Was travelling."

i.e. He suddenly realized that he was travelling in the wrong direction.

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