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在《PONS词典》中的词汇

call upon 动词 不及物动词

1. call upon (appeal to):

sich 第四格 [Hilfe suchend] an jdn wenden
to call upon sb to do sth
an etw 第四格 appellieren

2. call upon (use):

Present
Icall upon
youcall upon
he/she/itcalls upon
wecall upon
youcall upon
theycall upon
Past
Icalled upon
youcalled upon
he/she/itcalled upon
wecalled upon
youcalled upon
theycalled upon
Present Perfect
Ihavecalled upon
youhavecalled upon
he/she/ithascalled upon
wehavecalled upon
youhavecalled upon
theyhavecalled upon
Past Perfect
Ihadcalled upon
youhadcalled upon
he/she/ithadcalled upon
wehadcalled upon
youhadcalled upon
theyhadcalled upon