A modifier is an adjective or adverb that
modifies a verb. Misplaced modifiers can often cause confusing, and sometimes hilarious situations.
Consider the sentences below:
1. I spoke to her for hardly five minutes.
2. I hardly spoke to her for five minutes.
The first one means that you were speaking, but couldn't continue for more than five minutes, for whatever reasons. However, the second one implies that you were tongue-tied, and just couldn't talk.
Another example:
1. I only gave him ten rupees.
2. I gave him only ten rupees.
3. Only I gave him ten rupees.
If you look closely, all sentences have different meanings. Generally, there are two kinds of issues encountered with modifiers:
a) Dangling modifiers
b) Misplaced modifiers
Dangling modifier - it is tough to identify where the adverb/adjective fits in. For example, "Piled up next to the washing machine, I began doing the laundry."
The sentence means I was piled up

next to the washing machine, instead of the laundry. The correction would be "I began doing the laundry piled up next to the washing machine.
Misplaced modifier - creates a comic effect by incorrect placement of words. For example, "He was staring at the girl by the vending machine wearing dark glasses."
The girl wasn't wearing the dark glasses, in this case!! It was the vending machine. To correct, use, "He was staring at the girl wearing dark glasses, by the vending machine."
Please do keep writing in, if there are any questions, or suggestions.