我的朋友 Sarah，我昨天和她通了电话，现在好多了。
My friend Sarah, who I called yesterday, is doing much better now.
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who英 /huː/|美 /hu/
解释
非限定性定语从句，who 作 called 的宾语。用逗号与主句隔开，去掉从句后主句'我的朋友 Sarah 现在好多了'仍完整。
My friend Sarah, who I called yesterday, is doing much better now.
非限定性定语从句，who 作 called 的宾语。用逗号与主句隔开，去掉从句后主句'我的朋友 Sarah 现在好多了'仍完整。