teach students how to use the English phrase “come by" in English only

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Welcome to learning about the phrasal verb 'come by'. This versatile phrase has two main meanings in English. First, it means to visit someone briefly or casually, like dropping by a friend's house. Second, it means to obtain or acquire something, such as finding a rare book. As a phrasal verb, 'come by' can be used in both separable and inseparable forms depending on the context and meaning. The first meaning of 'come by' is to visit someone briefly or casually. This is an informal way to say you're stopping by someone's place for a short visit. For example, you might say 'I'll come by your house later' when you want to visit a friend. Or 'She came by the office yesterday' to describe someone's brief visit to work. You can also ask 'Can you come by around 3 PM?' when inviting someone over. Remember, when 'come by' means visit, it's inseparable - you cannot put words between 'come' and 'by'. The second meaning of 'come by' is to obtain or acquire something. This can happen through finding, earning, or receiving items in various ways. For example, you might ask 'How did you come by this rare book?' when wondering how someone found or obtained something special. You could say 'She came by her wealth through hard work' to describe how someone earned their money. Or 'It's hard to come by good employees these days' when talking about the difficulty of finding quality workers. Unlike the visit meaning, when 'come by' means obtain, it can sometimes be separable with objects. Now let's look at the grammar rules for using 'come by' correctly. When 'come by' means visit, it's always inseparable - you cannot put words between 'come' and 'by'. You say 'come by the store' or 'come by my house'. However, when 'come by' means obtain, it can sometimes be separable with objects. You can say 'come by something' or 'come something by'. Common time expressions used with 'come by' include 'later', 'tomorrow', 'yesterday', and specific times like 'around 3 PM'. Avoid common mistakes like separating the phrasal verb when it means visit, using wrong tenses, or adding unnecessary prepositions. Let's see 'come by' in practical, real-world situations. In the workplace, you might say 'I'll come by your desk after lunch' when planning to visit a colleague. In social contexts, you could invite someone by saying 'Come by anytime you're in the neighborhood.' When shopping, you might comment that 'These vintage items are hard to come by,' meaning they're difficult to find. In family situations, you could say 'Grandma came by with cookies' to describe a visit. These mini-dialogues show natural usage: 'When can you visit?' 'I'll come by around 6 PM.' Or 'Where did you find this?' 'I came by it at a garage sale.' Practice using 'come by' in these everyday contexts.