來源:網(wǎng)絡(luò)資源 2023-01-25 20:41:21
動詞加ing做謂語情況
做謂語時動詞加ing前面必須加上be動詞,形成be+動詞ing(現(xiàn)在分詞)作句子謂語,構(gòu)成進(jìn)行時態(tài)句子。
例如:
He is reading a book now.他正在看書.
He was watching TV when his mother came in.他媽媽進(jìn)來時,他正在看電視。
They've been waiting for you for three hours.他們等你三個小時了.
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