Thank you for your help. One more similar patterns goes.

1. The heavy rain made it difficult for me to open my eyes.

2. The loud music made it difficult for me to focus on my study.

3. The heavy snow made it difficult for me to ride a bike.

1-1. The heavy rain made it difficult that I opened my eyes.

2-2. The loud music made it difficult that I focused on my study.

3-3. The heavy snow made it difficult that I rode a bike.
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Are they all grammatical? Would you correct some errors?

1-1, 2-2, and 3-3 are incorrect. Substituting a noun clause for the infinitive phrase is incorrect in this context.

Thank you. What about the following ones?

1-1. The heavy rain made it difficult that I tried to open my eyes.

2-2. The loud music made it difficult that I tried to focus on my study.

3-3. The heavy snow made it difficult that I tried to ride a bike.

Out of the three patterns you provided, only the first one is grammatically correct. The correct structures are:

1. The heavy rain made it difficult for me to open my eyes.
2. The loud music made it difficult for me to focus on my study.
3. The heavy snow made it difficult for me to ride a bike.

In these sentences, "it" is a placeholder subject, and "difficult" is an adjective modifying the verb phrases "to open my eyes," "to focus on my study," and "to ride a bike." The preposition "for" is used to indicate the cause or reason for the difficulty.

On the other hand, the alternative patterns you proposed ("The heavy rain made it difficult that I opened my eyes," "The loud music made it difficult that I focused on my study," and "The heavy snow made it difficult that I rode a bike") are not grammatically correct. Instead, you should use the structure "it + verb + (for someone) + to do something" to express the difficulty caused by an external factor.