Page 158 - Grammar Basic_Neat

10/2/2023

USAGE

SHOULD vs OUGHT TO

NOTE: “Should” can be replaced by “Ought to” without a

change in meaning, but Ought to sounds more formal and is
used less frequently.

USAGE

MUST

#1 Express obligation or duty
(refer to laws and regulations)
You must wear a seatbelt at all times.

#2 Emphasize the necessity of something
Humans must drink water every day.

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