Examples:
‘Drop by next time you are in the area.’
‘My neighbour dropped in for a chat.’
‘We’ll drop by on Tuesday morning.’
If someone drops by, they visit someone informally and often just for a short time. The visit is not planned in detail and is often spontaneous.
Tip:
Try to build up your knowledge of verbs that have more than one part. For example: drop by, put on, look forward to, come across. When you check their meanings in a dictionary, you need to check if they need an object and if they can be separated.
Examples:
She put her jacket on
He put on his jacket
He put it on
He’s looking forward to his holiday
I look forward to hearing from you
We’re looking forward to it
They came across it in an antique shop