Both ‘Until’ and ‘Unless’ are generally used as conjunctions to connect the sentences in English. Note: Both of these might also be used as prepositions, but we are learning the use of connectors or conjunctions. Look at the difference:
Use of Unless
Unless is used, when the condition is set, and is already considered negative form in connectors, so don’t use ‘Not’ with Unless sentence. Here are some examples:
# I shall not lend you money unless you give me gold.
# He will not come to your home unless you go to his.
# Bank will not provide you loan unless you show them your original identities.
# He will not trust you unless you prove yourself.
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Use of Until
Until is used up to the particular time, and is already considered negative form in connectors, so don’t use ‘Not’ with Until sentence. Here are some examples:
# Wait here until I come back.
# Until I complete the home-work please don’t switch-on the T.V.
# Until the train comes don’t board.
# They did not come until the meeting was half over.
# He read until his guests arrived.
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