Please make sure that your seat belt is securely fastened.
The word "securely" is not an adverb in the sentence. It is an adjective describing how the frame was fastened.
Yes, the word securely is an adverb.An example sentence is "he securely tied the boat to the harbour".
all the inmates are securely locked in the asylum
Any humility is securely encased in his huge ego.
The word "lengthwise" is not an adverb in this sentence. It is describing the manner in which the frame was measured.
"Lengthwise' and "securely" are the adverbs. Adverbs modify the verb, and tell how something is done.
You measured the frame lengthwise and then fastened it securely. There are two adverbs in this sentence - lengthwise (modifying measured) and securely (modifying fastened). All other words are not adverbs.
In the sentence "We measured the frame lengthwise and then fastened securely," the adverb is "securely," as it describes how the action of fastening was performed. The word "lengthwise" functions as an adverb as well, indicating the manner in which the frame was measured. Therefore, both "lengthwise" and "securely" are adverbs in this context.
The word "lengthwise" in the sentence is not an adverb; it is an adverbial form derived from the noun "length," describing the manner in which the frame was measured. The other adverbs, "then" and "securely," describe actions related to time and manner, respectively.
securely
You wouldn't use this word. The word you want is insecurely, meaning hesitantly or not securely. He held on insecurely, almost letting go. She felt her way insecurely.
Please make sure to latch the gate securely after you enter the garden, so the dog doesn't escape.