自學英語新概念第二冊第17課筆記
文法：
1.must/can對現在/過去很确信的肯定/否定的推測：
現在：must do can't do
must be adj./n. can't be adj./n.
must be doing can't be doing
過去：must have done can't have done
must have been adj./n. can't have been adj./n.
must have been doing can't have been doing
2.must/have to用法差別
短語：
in spite of盡管
at least至少
take part in參加
it must be terrible to do sth 什麼事情一定是很可怕的
#英語#
