1. ... If/whether ...
1.1) There's a nagging doubt in her mind [if/whether what is doing is right].
1.2) She has doubts [if/whether she is doing the right thing].
1.3) She is in a doubt [if/whether she is doing the right thing].
2. ... that ...
2.1) There's no doubt [that scientists will discover a vaccine for Coronavirus one day]
2.2) People don't have the slightest doubt [that scientists will discover a vaccine for Coronavirus one day]
2.3) A few people are still in doubt [that they will ever get over economic loss caused by the Coronavirus]
3. "... as to ... "
Are the sentences with "if/whether" and "that" correct and/or natual? Is "as to" possible in place of "if/whether" and "that" in the examples above, please?
Thank you!
1) There's a nagging doubt in her mind [if/ whether what she is doing is right]. 2) She has doubts [if/ whether she is doing the right thing]. 3) She is in a doubt in doubt about [if/ whether she is doing the right thing].
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Laborious1.1) There's a nagging doubt in her mind[if/whether what she is doing is right].
Laborious1.2) She has doubts[if/whether she is doing the right thing].
Laborious1.3) She isin a doubtin doub
Laborious3. "... as to ... "
Are the sentences with "if/whether" and "that" correct and/or natural? Is "as to" possible in place of "if/whether" and "that" in the examples above, please?
You're right. For some reason I missed this one completely. Maybe I was distracted in my enthusiasm for how well you were