Would you like to let me know the verbs which don't have passive forms?

Let me know the websites about that.

For example;

1. His brother lacks confidence.
2. Confidence is lacked by his brother.
(#2 isn't correct, right?)

3. He reached the station.
4. The station was reached by him.
(#4 isn't grammatical, is it?)

Thank you.

Both 2 and 4 are grammatically correct, but they are both awkward and clumsy. That is, they don't read smoothly.

I am not sure there's a list of any verbs that cannot be made into passive voice. You might have to keep track of the ones that are awkwardly done (such as these two you've used here) and create your own list.

#2 and 4 are in the passive voice. # 4 is grammatical but awkward.

These sites will help you understand verbs in the passive voice.

http://englishplus.com/grammar/00000359.htm

http://www.englishclub.com/grammar/verbs-voice.htm

Certainly! In English, most verbs can have passive forms, but there are a few exceptions. Here are some common examples of verbs that don't have passive forms:

1. Lack
- His brother lacks confidence. (Active)
- *Confidence is lacked by his brother.* (Passive)
(*Note: The passive form of "lack" is not commonly used. Instead, we usually rephrase the sentence to say "Confidence is lacking in his brother.")

2. Reach
- He reached the station. (Active)
- *The station was reached by him.* (Passive)
(*Note: While this construction is grammatically correct, it may sound awkward or less natural. In most cases, we prefer the active voice.)

It's important to note that verbs that express mental states or emotions, such as "believe," "know," "like," "love," etc., are also typically not used in the passive voice.

I hope this helps clarify which verbs do not have passive forms! If you have any more questions, feel free to ask.