不定式结构作主语 
To see one time is better than to hear a hundred times.
To persevere means victory!
注①:在很多情况下,特别是在口语中,常采用先行it代替主语,而把不定式后置:
It’s a great pleasure to be here.
It is not an easy thing to master a language.
To see one time is better than to hear a hundred times.
To persevere means victory!
注①:在很多情况下,特别是在口语中,常采用先行it代替主语,而把不定式后置:
It’s a great pleasure to be here.
It is not an easy thing to master a language.

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