1. I bought the house to live in.
2. I bought the house which I can live in.
3. I bought the house which I will live in.
4. I bought the house which I should live in.
(Does #1 mean #2, #3, or #4?)
5. I have a friend to help me.
6. I have a friend who can help me.
7. I have a friend who will help me.
8. I have a friend who must help me.
(Does #5 mean #6 or #7? Or #8? Can all the three sentences be changed into #5? Then, I think the meaning of #5 is not clear. Don't you think so?)
The verbs "can", and "should" do not have quite the same meaning. "Can" means that the house is liveable. "Should" means that you are obligated to live there.
1 and 3 have pretty much the same meaning.
# 8 does not have the same meaning and the others. "Must" means that one has to do something.
1. Sentence #1 means "I bought the house in order to live in it."
2. Sentence #2 means "I bought the house because it is suitable for me to live in."
3. Sentence #3 means "I bought the house with the intention of living in it."
4. Sentence #4 means "I bought the house because it is recommended or advised for me to live in."
Sentence #1 (I bought the house to live in) could be an umbrella term that encompasses the meanings of sentences #2, #3, and #4. It expresses the general intention or purpose of buying the house, without specifically indicating the reason behind it.
5. Sentence #5 (I have a friend to help me) means "I have a friend who is available or capable of helping me."
6. Sentence #6 (I have a friend who can help me) carries a similar meaning to sentence #5, indicating that the friend possesses the ability to provide assistance.
7. Sentence #7 (I have a friend who will help me) implies that the friend has agreed or promised to help in the future, expressing their willingness to assist.
8. Sentence #8 (I have a friend who must help me) suggests that the friend is obligated or has a strong necessity to help.
Regarding sentence #5, it can convey a similar meaning to sentences #6, #7, and #8, although it may lack some of the specific nuances of those sentences. Sentence #5 is more general in nature and does not explicitly state the friend's ability, willingness, or necessity to help. Therefore, it may not provide as much clarity or detail as the other sentences.